124 entries under spontaneous topic. ×

1
unartful(adjective, simple, natural, casual, impulsive)
1
unasked for(expression, adjective, unwelcome, unwanted)
1
unavoidable(adjective, simple, natural, casual, impulsive)
1
unconscious(adjective, simple, natural, casual, impulsive)
1
uncontrived(adjective, simple, natural, casual, impulsive)
1
unconventional(adjective, simple, moderate, straightforward, casual)
1
unfussy(adjective, simple, easy, plain, relaxed)
1
unintentional(adjective, simple, natural, casual, impulsive)
1
unofficial(adjective, simple, easy, plain, straightforward)
1
unpremediated(adjective, simple, natural, casual, impulsive)
1
unpremeditated(informal, casual, impulsive, unprepared)
1
unprepared(casual, impulsive, impromptu, unrehearsed)
1
unprescribed(adjective, deliberate, natural, willing, charitable)
1
unrehearsed(casual, impulsive, unprepared, impromptu)
1
unsophisticated(adjective, simple, natural, casual, impulsive)
1
urbane(adjective, simple, easy, plain, straightforward)
1
wished(adjective, deliberate, natural, willing, charitable)
1
without ceremony(expression, adjective, simple, straightforward, casual)
1
witting(adjective, deliberate, natural, willing, charitable)
0
gradual
10 years ago|55k views|share |citing 
APASmart Define. (2016). free thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/free/thesaurus/synonyms
ChicagoSmart Define. 2016. "free thesaurus" https://smartdefine.org/free/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2016, free thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/free/thesaurus/synonyms>.
MLASmart Define. "free thesaurus" 1 March 2016. Web. 29 September 2026. <https://smartdefine.org/free/thesaurus/synonyms>