112 entries under spontaneous topic. ×

10
casual(adjective, adverb, calm, open, smooth)
10
unstudied(adjective, open, simple, reasonable, clean)
9
everyday(adjective, characteristic, simple, informal, pure)
9
familiar(adjective, calm, open, free, smooth)
9
folksy(adjective, open, simple, clean, plain)
9
unconstrained(adjective, simple, relaxed, straightforward, casual)
9
unprompted(adjective, simple, casual, impulsive, willing)
7
emotional(adjective, instinctive, gut, intuitive)
7
free(adjective, adverb, open, direct, simple)
7
unceremonious(adjective, calm, simple, easy, plain)
7
unconscious(adjective, simple, casual, routine, emotional)
6
immediate(adjective, instinctive, intuitive)
6
intimate(adjective, characteristic, simple, usual, straightforward)
6
unforced(adjective, calm, open, smooth, simple)
5
homey(adjective, open, simple, clean, plain)
5
offhand(adjective, calm, simple, easy, casual)
5
perceptive(adjective, instinctive, intuitive)
4
unrestrained(adjective, calm, simple, plain, violent)
4
uncontrived(adjective, open, simple, plain, casual)
4
understood(adjective, instinctive, intuitive)
10 years ago|51k views|share |citing 
APASmart Define. (2016). natural thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/natural/thesaurus/synonyms
ChicagoSmart Define. 2016. "natural thesaurus" https://smartdefine.org/natural/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, natural thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/natural/thesaurus/synonyms>.
MLASmart Define. "natural thesaurus" 15 February 2016. Web. 29 September 2026. <https://smartdefine.org/natural/thesaurus/synonyms>