2
unwilling(obligatory, compulsory)
2
willing(adjective, simple, natural, casual, impulsive)
2
zoological(adjective, physical, bodily, visceral)
1
connatural(characteristic, reasonable, ordinary, natural, normal)
1
aboveboard(simple, plain, fresh, innocent, sincere)
1
ad-lib(adjective, simple, passionate, violent, natural)
1
aimless
1
animalian
1
animalic
1
animalistic
1
artful(adjective, intuitive)
1
astute(adjective, intuitive)
1
atavistic
1
beastlike
1
being oneself(expression, adjective, open, simple, easy)
1
birth
1
break loose(expression, adjective, simple, natural, casual)
1
brutal
1
brutelike
1
built-in
11 years ago|11k views|share |citing 
APASmart Define. (2015). instinctive thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/instinctive/thesaurus/synonyms
ChicagoSmart Define. 2015. "instinctive thesaurus" https://smartdefine.org/instinctive/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, instinctive thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/instinctive/thesaurus/synonyms>.
MLASmart Define. "instinctive thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/instinctive/thesaurus/synonyms>