1
rigid
1
rubbery
1
rugged
1
significant
1
square-built
1
square-shouldered
1
stalwart
1
stocky
1
stout
1
strapping
1
substantial
1
thick(adjective, strong, sound)
1
thickset
1
toughened
1
well
0
coagulate
0
cogent
0
compact
0
concentrate
0
congeal
11 years ago|3.3k views|share |citing 
APASmart Define. (2015). frail thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/frail/thesaurus/antonyms
ChicagoSmart Define. 2015. "frail thesaurus" https://smartdefine.org/frail/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, frail thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/frail/thesaurus/antonyms>.
MLASmart Define. "frail thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/frail/thesaurus/antonyms>