7
less important
6
inconsequential(adjective, light)
6
light
5
small(adjective, light)
5
thin(adjective, light)
5
trivial(adjective, light, important, substantial, serious)
5
unimportant(adjective, light)
4
minor(adjective, insignificant)
4
feeble
4
insignificant
3
easy(adjective, light)
3
facile(adjective, light)
3
frivolous
3
insubstantial
3
lightweight
3
little
3
trifling
3
unserious
3
unsubstantial(adjective, light)
3
weightless
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APASmart Define. (2015). weighty thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/weighty/thesaurus/antonyms
ChicagoSmart Define. 2015. "weighty thesaurus" https://smartdefine.org/weighty/thesaurus/antonyms (accessed September 23, 2026).
HarvardSmart Define 2015, weighty thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/weighty/thesaurus/antonyms>.
MLASmart Define. "weighty thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/weighty/thesaurus/antonyms>