4
unreserved(adjective, open, free, easy, friendly)
4
unrestrained(adjective, free, simple, friendly, plain)
3
amiable
3
beat(verb, unusual, strange, unique, eccentric)
3
careless
3
clear(adjective, open, free, easy, loose)
3
comfortable(adjective, calm, quiet, open, free)
3
eccentric(unusual, strange, unique, unconformity)
3
escaped(adjective, clear, open, free, easy)
3
exceptional(unusual, strange, eccentric, unconformity)
3
free-and-easy(adjective, open, free, simple, easy)
3
heterodox
3
light(adjective, easy, lively, cheerful, jolly)
3
off the cuff(expression, adjective, idiom, free, impromptu)
3
officious(adjective, open, free, easy, friendly)
3
sluttish
3
snug(adjective, calm, open, free, simple)
3
unliterary
3
vulgar
3
warm(adjective, friendly, sociable, gregarious)
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APASmart Define. (2016). informal thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/informal/thesaurus/synonyms
ChicagoSmart Define. 2016. "informal thesaurus" https://smartdefine.org/informal/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, informal thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/informal/thesaurus/synonyms>.
MLASmart Define. "informal thesaurus" 29 February 2016. Web. 25 September 2026. <https://smartdefine.org/informal/thesaurus/synonyms>