4
inessential(adjective, small, insignificant, unimportant, trivial)
4
involuntary(adjective, simple, natural, impulsive, willing)
4
irresponsible(adjective, feature, state, trait, happy-go-lucky)
4
lively(adjective, feature, state, easy, trait)
4
low-pressure(adjective, simple, easy, mild, relaxed)
4
mellow(adjective, calm, cool, simple, plain)
4
nonessential(adjective, slight, lower, value, inferior)
4
numb(adjective, unfeeling, insensitive, under, asleep)
4
ordinary(adjective, simple, easy, lower, plain)
4
quiet(adjective, feature, state, calm, informal)
4
reckless(adjective, feature, state, careless, trait)
4
slight(adjective, light, weak, soft, lower)
4
sloppy(adjective, free, soft, careless, indifferent)
4
smooth(adjective, calm, cool, pleasant, easy)
4
spirited(adjective, feature, state, easy, trait)
4
sporty
4
straightforward(adjective, succinct)
4
subsidiary(light, slight, low, small, inferior)
4
temporary(adjective, moving, limited, unsettled, transient)
4
tolerant(adjective, feature, state, open, soft)
10 years ago|35k views|share |citing 
APASmart Define. (2015). casual thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/casual/thesaurus/synonyms
ChicagoSmart Define. 2015. "casual thesaurus" https://smartdefine.org/casual/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, casual thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/casual/thesaurus/synonyms>.
MLASmart Define. "casual thesaurus" 1 December 2015. Web. 26 September 2026. <https://smartdefine.org/casual/thesaurus/synonyms>