1
impetuous(adjective, simple, natural, casual, impulsive)
1
impromptu(adjective, simple, natural, casual, impulsive)
1
improvised(adjective, simple, natural, casual, impulsive)
1
in accord with(expression, adjective, idiom, keen, happy)
1
in debt(adjective, happy, welcome, joyful, satisfied)
1
in favor(expression, adjective, keen, happy, agreeable)
1
in the mood(expression, adjective, idiom, keen, happy)
1
inclined(adjective, keen, happy, agreeable, enthusiastic)
1
indebted to(adjective, happy, welcome, joyful, satisfied)
1
inevitable(adjective, simple, natural, casual, impulsive)
1
instance
1
introduction
1
investigated(deliberate, affected, prepared, intentional, calculated)
1
involuntary(adjective, simple, natural, casual, impulsive)
1
irresistible(adjective, simple, natural, casual, impulsive)
1
joyful(adjective, happy, welcome, satisfied, grateful)
1
joyous(adjective, happy, welcome, joyful, satisfied)
1
judged(adjective, careful, thoughtful, cautious, planned)
1
knowing
1
knowingly
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APASmart Define. (2015). voluntary thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/voluntary/thesaurus/synonyms
ChicagoSmart Define. 2015. "voluntary thesaurus" https://smartdefine.org/voluntary/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, voluntary thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/voluntary/thesaurus/synonyms>.
MLASmart Define. "voluntary thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/voluntary/thesaurus/synonyms>