97 entries under simple topic. ×

6
homely(adjective, ordinary, familiar, natural)
6
plain(adjective, common, ordinary, familiar)
6
sporty(adjective, casual, flashy)
6
unaffected(adjective, open, ordinary, natural)
6
unconstrained(adjective, clear, open, free)
5
congenial(adjective, casual)
5
homey(adjective, cool, relaxed, ordinary)
5
unassuming(adjective, ordinary, comfortable, unsophisticated)
4
cool(adjective, informal, casual)
4
extempore(adjective, free, casual, spontaneous)
4
frank(adjective, clear, open, easy)
4
open(adjective, calm, clear, free, smooth)
4
straightforward(adjective, casual, succinct)
4
unfussy(adjective, casual)
4
unrestrained(adjective, free, friendly, plain)
3
comfortable(adjective, calm, quiet, open, free)
3
free-and-easy(adjective, open, free, easy)
3
snug(adjective, calm, open, free)
2
commonplace(adjective, common, ordinary, familiar)
2
democratic(adjective, casual, representative)
10 years ago|18k views|share |citing 
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>