3
believable
3
brawny
2
all-conquering
2
coarse
2
knockabout
1
able
1
conceivable
1
earthly
1
hard
1
healthy(adjective, strong, sound)
1
hefty
1
imaginable
1
imperishable
1
indestructible
1
lasting
1
liable
1
mighty
1
outsize
1
possible
1
potent
10 years ago|2.9k views|share |citing 
APASmart Define. (2016). flimsy thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/flimsy/thesaurus/antonyms
ChicagoSmart Define. 2016. "flimsy thesaurus" https://smartdefine.org/flimsy/thesaurus/antonyms (accessed September 24, 2026).
HarvardSmart Define 2016, flimsy thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/flimsy/thesaurus/antonyms>.
MLASmart Define. "flimsy thesaurus" 26 January 2016. Web. 24 September 2026. <https://smartdefine.org/flimsy/thesaurus/antonyms>