Some French nouns can only be singular, some can only be plural, and some have different meanings depending on whether they are singular or plural.
abattis (m) brushwood
les abattis (m) giblets, (informal) arms and legs, limbs
assise (f) wall support, foundation
assises (f) assembly, conference
autorité (f) authority
les autorités (f) the authorities
le barbe barb
la barbe beard
les barbes (f) ragged edge
le bois wood (in general), woodwind instrument
les bois (m) woodwind section
le ciseau chisel
les ciseaux (m) scissors
le cuivre copper
les cuivres (m) copper instruments, tools
la douceur softness, gentleness
les douceurs (f) sweets, desserts; sweet talk
eau (f) water (in general)
les eaux (f) river/lake/sea water, wake
économie (f) economics
les économies (f) savings
écriture (f) writing, (finance) entry
les écritures (f) accounts, books
la façon way, manner, means
les façons (f) manners, behavior
le fer iron
les fers (m) chains, fetters
le guide guide (book, tour)
la guide girl scout/guide
les guides (f) reins
humanité (f) humanity, mankind
les humanités (f) humanities, classics
le lendemain the next day, the period right after
les lendemains (m) future, prospects, consequences
la lunette telescope
les lunettes (f) glasses, spectacles
la mémoire memory
le mémoire memorandum, report
les mémoires (m) memoirs
la menotte (babytalk) hand
les menottes (f) handcuffs
ouïe (f) (sense of) hearing
les ouïes (f) gills
le papier paper
les papiers (m) documentation
la pâte pastry, dough
les pâtes (f) pasta, noodles
le ravage (literary) pillaging
les ravages (m) havoc, ravages
le status status
les status (m) statutes
la toilette toilette, hygiene, act of getting ready
les toilettes (f) lavatory, restroom
la vacance vacancy
les vacances (f) vacation, holiday
When talking about arts and crafts, a singular noun indicates the activity itself, while both the singular and plural refer to the product.
le cinéma cinema, movie industry
le(s) cinéma(s) cinema(s), movie theater(s)
la couture sewing
la (les) couture(s) seam(s)
la danse dancing
la (les) danse(s) dance(s)
le dessin the act of drawing
le(s) dessin(s) drawing(s)
la peinture the act of painting
la (les) peinture(s) painting(s)
la sculpture the act of sculpting
la (les) sculpture(s) sculpture(s)
le théâtre theater arts
le(s) théâtre(s) theaters(s)
le tricot the act of knitting
le(s) tricot(s) sweater(s), jumper(s)
Languages are always singular (and always, au fait, masculine). When the name of a language is capitalized, both the singular and plural indicate people of that nationality.
anglais (m) English language
un Anglais, des Anglais an Englishman, English people
arabe (m) Arabic language
un Arabe, des Arabes an Arab, Arabs
le français French language
un Français, des Français a Frenchman, French people
Only singular French nouns | Only plural French nouns | Singular/plural meaning changes

