User:Boissière/Categories with first word plural differences

First category	Second category
Category:Arts_awards	Category:Art_awards
Category:Arts_education	Category:Art_education
Category:B-Class_sports_articles	Category:B-Class_Ports_articles
Category:Banks_of_China	Category:Bank_of_China
Category:Blues_albums	Category:Blue_albums
Category:Blues_songs	Category:Blue_songs
Category:Congregations_of_Holy_Cross	Category:Congregation_of_Holy_Cross
Category:Figurines_albums	Category:Figurine_albums
Category:GA-Class_sports_articles	Category:GA-Class_Ports_articles
Category:Governments_of_Ireland	Category:Government_of_Ireland
Category:Governments_of_New_Zealand	Category:Government_of_New_Zealand
Category:Hibernians_F.C._players	Category:Hibernian_F.C._players
Category:Karas_Region	Category:Kara_Region
Category:Laws_of_the_People's_Republic_of_China	Category:Law_of_the_People's_Republic_of_China
Category:Linguistics_educators	Category:Linguistic_educators
Category:List-Class_sports_articles	Category:List-Class_Ports_articles
Category:Margraves_of_Septimania	Category:Margrave_of_Septimania
Category:Middle-earth_words	Category:Middle-earth_swords
Category:Moons_in_fiction	Category:Moon_in_fiction
Category:News_media	Category:New_media
Category:Northerns_cricketers	Category:Northern_cricketers
Category:Seas_of_Japan	Category:Sea_of_Japan
Category:Spoons_albums	Category:Spoon_albums
Category:Start-Class_sports_articles	Category:Start-Class_Ports_articles
Category:States_of_Mexico	Category:State_of_Mexico
Category:Stations_of_Nagoya_Railroad	Category:Station_of_Nagoya_Railroad
Category:Stub-Class_sports_articles	Category:Stub-Class_Ports_articles
Category:Swords_albums	Category:Sword_albums
Category:Sports_in_the_United_Kingdom	Category:Sport_in_the_United_Kingdom
Category:Graphic_file_formats	Category:Graphics_file_formats
Category:Unassessed_Ports_articles	Category:Unassessed_sports_articles
Category:Governments_of_Italy	Category:Government_of_Italy
Category:Communications_journals	Category:Communication_journals
Category:Sports_in_Montreal	Category:Sport_in_Montreal
Category:Musicians_templates	Category:Musician_templates
Category:WikiProject_Ports_articles	Category:WikiProject_Sports_articles
Category:Wikipedian_who_use_Emacs	Category:Wikipedians_who_use_Emacs
Category:Wikipedians_Chelsea_F.C._fans	Category:Wikipedian_Chelsea_F.C._fans
Category:Parliament_of_Malaysia	Category:Parliaments_of_Malaysia
Category:Hibernians_F.C.	Category:Hibernian_F.C.
Category:Sport_by_country	Category:Sports_by_country
Category:Games_user_templates	Category:Game_user_templates
Category:Cabinets_of_the_Netherlands	Category:Cabinet_of_the_Netherlands
Category:Albums_articles_needing_attention	Category:Album_articles_needing_attention
Category:WikiProject_Ports_participants	Category:WikiProject_Sports_participants
Category:Athletics_clubs_in_the_United_States	Category:Athletic_clubs_in_the_United_States
Category:Comic_artists	Category:Comics_artists
Category:Sports_in_Lebanon	Category:Sport_in_Lebanon
Category:Arts_festivals	Category:Art_festivals
Category:Ceramics_engineering	Category:Ceramic_engineering
Category:WikiProject_Ports_templates	Category:WikiProject_Sports_templates
Category:NA-Class_Ports_articles	Category:NA-Class_sports_articles
Category:NA-importance_Ports_articles	Category:NA-importance_sports_articles
Category:Unknown-importance_Ports_articles	Category:Unknown-importance_sports_articles
Category:C-Class_Ports_articles	Category:C-Class_sports_articles
Category:Material_science	Category:Materials_science
Category:Songs_articles_by_quality	Category:Song_articles_by_quality
Category:Chinese_pies	Category:Chinese_spies
Category:System_Architecture	Category:Systems_architecture
Category:Polish_printers	Category:Polish_sprinters
Category:Frontiers_Records_albums	Category:Frontier_Records_albums
Category:FA-Class_SCUBA_articles	Category:FA-Class_Cuba_articles
Category:C-Class_SCUBA_articles	Category:C-Class_Cuba_articles
Category:NA-Class_SCUBA_articles	Category:NA-Class_Cuba_articles
Category:Stub-Class_SCUBA_articles	Category:Stub-Class_Cuba_articles
Category:Start-Class_SCUBA_articles	Category:Start-Class_Cuba_articles
Category:B-Class_SCUBA_articles	Category:B-Class_Cuba_articles
Category:GA-Class_SCUBA_articles	Category:GA-Class_Cuba_articles
Category:List-Class_SCUBA_articles	Category:List-Class_Cuba_articles
Category:System_Engineering	Category:Systems_engineering
Category:Girls_(band)_albums	Category:Girl_(band)_albums
Category:Tadpoles_(band)_albums	Category:Tadpole_(band)_albums
Category:Sport_articles_needing_translation_from_Swedish_Wikipedia	Category:Sports_articles_needing_translation_from_Swedish_Wikipedia
Category:Crime_by_year	Category:Crimes_by_year
Category:Governments_of_Australia	Category:Government_of_Australia
Category:Foods_infobox_templates	Category:Food_infobox_templates
Category:Hercule_class_ships_of_the_line	Category:Hercules_class_ships_of_the_line
Category:Philippines_culture	Category:Philippine_culture
Category:Art_in_Northern_Ireland	Category:Arts_in_Northern_Ireland
Category:List_of_artists	Category:Lists_of_artists
Category:Bridges_articles_by_quality	Category:Bridge_articles_by_quality
Category:Article_requiring_a_direct_DNB_link	Category:Articles_requiring_a_direct_DNB_link
Category:Conductors_(music)	Category:Conductor_(music)
Category:Dukes_of_Sessa	Category:Duke_of_Sessa
Category:Film_based_on_plays	Category:Films_based_on_plays
Category:Indian_printers	Category:Indian_sprinters
Category:Wikipedian_in_Canada	Category:Wikipedians_in_Canada
Category:Governor_of_New_South_Wales	Category:Governors_of_New_South_Wales
Category:Death_from_stroke	Category:Deaths_from_stroke
Category:DarkSun_albums	Category:Dark_Suns_albums
Category:Art_centers_in_Minnesota	Category:Arts_centers_in_Minnesota
Category:State_of_Burma	Category:States_of_Burma
Category:Estonian_printers	Category:Estonian_sprinters
Category:Oceans_templates	Category:Ocean_templates
Category:State_of_Mexico_templates	Category:States_of_Mexico_templates
Category:Gulfs_of_Mexico	Category:Gulf_of_Mexico
Category:Turtles_articles_by_quality	Category:Turtle_articles_by_quality
Category:FL-Class_SCUBA_articles	Category:FL-Class_Cuba_articles
Category:Sport_in_Florida	Category:Sports_in_Florida
Category:Flag_of_Romania	Category:Flags_of_Romania
Category:Sport_teams_in_Ottawa	Category:Sports_teams_in_Ottawa
Category:Sports_in_Manila	Category:Sport_in_Manila
Category:Communication_in_Thailand	Category:Communications_in_Thailand
Category:Econometric_software	Category:Econometrics_software
Category:Bank_of_Japan	Category:Banks_of_Japan
Category:King_of_Croatia	Category:Kings_of_Croatia
Category:Neighborhood_of_Kampala	Category:Neighborhoods_of_Kampala
Category:Equestrian_at_the_1900_Summer_Olympics	Category:Equestrians_at_the_1900_Summer_Olympics
Category:Equestrian_at_the_1912_Summer_Olympics	Category:Equestrians_at_the_1912_Summer_Olympics
Category:Equestrian_at_the_1920_Summer_Olympics	Category:Equestrians_at_the_1920_Summer_Olympics
Category:Equestrian_at_the_1924_Summer_Olympics	Category:Equestrians_at_the_1924_Summer_Olympics
Category:Equestrian_at_the_1964_Summer_Olympics	Category:Equestrians_at_the_1964_Summer_Olympics
Category:Equestrian_at_the_2004_Summer_Olympics	Category:Equestrians_at_the_2004_Summer_Olympics
Category:Equestrian_at_the_2008_Summer_Olympics	Category:Equestrians_at_the_2008_Summer_Olympics
Category:Mayor_of_Keelung	Category:Mayors_of_Keelung
Category:Communication_in_the_United_States	Category:Communications_in_the_United_States
Category:Lithuanian_printers	Category:Lithuanian_sprinters
Category:Equestrian_at_the_2000_Summer_Olympics	Category:Equestrians_at_the_2000_Summer_Olympics
Category:Bank_of_Canada	Category:Banks_of_Canada
Category:Organization_articles_by_quality	Category:Organizations_articles_by_quality
Category:Ambassador_of_Sri_Lanka_to_Indonesia	Category:Ambassadors_of_Sri_Lanka_to_Indonesia
Category:Peoples_of_the_American_Old_West	Category:People_of_the_American_Old_West
Category:Sistar_albums	Category:Sistars_albums
Category:Girls_Next_Door_songs	Category:Girl_Next_Door_songs
Category:Equestrians_at_the_2011_Pan_American_Games	Category:Equestrian_at_the_2011_Pan_American_Games
Category:Sports_in_Bihar	Category:Sport_in_Bihar
Category:Wikipedians_translators	Category:Wikipedian_translators
Category:Archdeacon_of_Totnes	Category:Archdeacons_of_Totnes
Category:Lists_articles_by_quality	Category:List_articles_by_quality
Category:Rolling_tock_of_India	Category:Rolling_stock_of_India
Category:Art_competitions	Category:Arts_competitions
Category:French_pies	Category:French_spies
Category:Museums_in_Styria	Category:Museum_in_Styria
Category:Methodists_ministers	Category:Methodist_ministers
Category:Sports_in_Nairobi	Category:Sport_in_Nairobi
Category:Artists_collectives	Category:Artist_collectives
Category:Mammals_articles_by_quality	Category:Mammal_articles_by_quality
Category:Philippines_television_series	Category:Philippine_television_series
Category:Equestrian_at_the_2012_Summer_Olympics	Category:Equestrians_at_the_2012_Summer_Olympics
Category:Equestrian_at_the_1952_Summer_Olympics	Category:Equestrians_at_the_1952_Summer_Olympics
Category:Death_by_Arrow_Wounds	Category:Deaths_by_arrow_wounds
Category:Comics_book_covers	Category:Comic_book_covers
Category:Bishop_of_Plasencia	Category:Bishops_of_Plasencia
Category:Airline_of_France	Category:Airlines_of_France
Category:Archdeacon_of_Pontefract	Category:Archdeacons_of_Pontefract
Category:Sport_in_Kaohsiung	Category:Sports_in_Kaohsiung
Category:Fort_in_Bangladesh	Category:Forts_in_Bangladesh
Category:Sounds_by_country	Category:Sound_by_country
Category:Sports_in_Jammu_and_Kashmir	Category:Sport_in_Jammu_and_Kashmir
Category:Equestrian_at_the_1928_Summer_Olympics	Category:Equestrians_at_the_1928_Summer_Olympics
Category:Roses_of_Tralee	Category:Rose_of_Tralee
Category:Ancient_ports	Category:Ancient_sports
Category:Graduate_of_the_Royal_Military_Academy,_Woolwich	Category:Graduates_of_the_Royal_Military_Academy,_Woolwich
Category:Poet_Laureate_of_Alabama	Category:Poets_Laureate_of_Alabama
Category:Building_and_structures_in_Spring_Valley,_Nevada	Category:Buildings_and_structures_in_Spring_Valley,_Nevada

There are 155 entries in this list.