97 entries under simple topic. ×

19
unofficial(adjective, relaxed, familiar, casual)
17
relaxed(adjective, calm, quiet, clear, open)
16
easy(adjective, calm, clear, open)
16
unceremonious(adjective, calm, open, free)
15
familiar(adjective, calm, clear, open, smooth)
15
natural(adjective, adverb, calm, open, smooth)
13
free(adjective, adverb, open, fake)
13
everyday(adjective, plain, common, ordinary)
12
ordinary(adjective, easy, plain, common)
10
easygoing(adjective, cool, plain, relaxed)
9
colloquial(adjective, ordinary, familiar, natural)
8
friendly(adjective, calm, open, smooth)
8
intimate(adjective, quiet, easy, friendly)
8
breezy(adjective, cool, easy, mild)
8
loose(adjective, clear, open, easy)
8
unconventional(adjective, unusual, relaxed, strange)
8
unpretentious(adjective, open, ordinary, natural)
7
folksy(adjective, casual, succinct)
7
spontaneous(adjective, free, plain, relaxed)
6
cozy(adjective, easy, friendly, ordinary)
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APASmart Define. (2016). informal thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/informal/thesaurus/synonyms
ChicagoSmart Define. 2016. "informal thesaurus" https://smartdefine.org/informal/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, informal thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/informal/thesaurus/synonyms>.
MLASmart Define. "informal thesaurus" 29 February 2016. Web. 23 September 2026. <https://smartdefine.org/informal/thesaurus/synonyms>