8
loose(adjective, clear, open, simple, easy)
8
offhand(adjective, cool, free, careless, casual)
8
unconventional(adjective, simple, unusual, relaxed, strange)
8
unpretentious(adjective, open, simple, ordinary, natural)
7
folksy(adjective, simple, casual, succinct)
7
affable(adjective, open, easy, friendly, natural)
7
chatty(adjective, talkative, idiomatic)
7
common(adjective, ordinary, familiar, usual, normal)
7
spontaneous(adjective, free, simple, plain, relaxed)
6
cozy(adjective, simple, easy, friendly, ordinary)
6
homely(adjective, simple, ordinary, familiar, natural)
6
idiomatic(adjective, native, vernacular, colloquial)
6
irregular(unusual, strange, unique, eccentric, unconformity)
6
plain(adjective, simple, common, ordinary, familiar)
6
sporty(adjective, simple, casual, flashy)
6
unaffected(adjective, open, simple, ordinary, natural)
6
unconstrained(adjective, clear, open, free, simple)
5
candid(adjective, succinct)
5
congenial(adjective, simple, casual)
5
cordial(easy, friendly, bold, sociable, gregarious)
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APASmart Define. (2016). informal thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/informal/thesaurus/synonyms
ChicagoSmart Define. 2016. "informal thesaurus" https://smartdefine.org/informal/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, informal thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/informal/thesaurus/synonyms>.
MLASmart Define. "informal thesaurus" 29 February 2016. Web. 24 September 2026. <https://smartdefine.org/informal/thesaurus/synonyms>