Word parts common + -er Pronunciation (UK) IPA (key): /ˈkɒm.ə.nə(r)/ (US) IPA (key): /ˈkɑ.mə.nɚ/ Audio (UK)(file) Noun Singular commoner Plural commoners (countable) A member of the common people who has no title or rank. Adjective Positive common Comparative commoner Superlative commonest The comparative form of common; more common. Wikiwand - on Seamless Wikipedia browsing. On steroids.