3
unsubstantiated
3
vulnerable(adjective, weak, loose, unstable, wobbly)
2
evaporated
2
faithless
2
fallacious
2
fickle
2
fishy
2
fistular
2
fistulate
2
fistulous
2
flabby
2
flecked
2
floppy
2
frivolous
2
gas(noun, solid, liquid, reticulation, caldera)
2
gasified
2
gassy
2
gruel
2
illogical
2
in mind
10 years ago|7.4k views|share |citing 
APASmart Define. (2016). solid thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/solid/thesaurus/antonyms
ChicagoSmart Define. 2016. "solid thesaurus" https://smartdefine.org/solid/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2016, solid thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/solid/thesaurus/antonyms>.
MLASmart Define. "solid thesaurus" 29 March 2016. Web. 22 September 2026. <https://smartdefine.org/solid/thesaurus/antonyms>