16
important(adjective, characteristic, influence, importance, significance)
13
heavy(adjective, characteristic, importance, significance, weight)
12
big(adjective, characteristic, influence, importance, weight)
12
superstar(noun, person, influence, importance)
11
major(adjective, characteristic, influence, importance, significance)
9
heavyweight(adjective, characteristic, influence, importance, weight)
9
significant(adjective, characteristic, influence, importance, significance)
8
considerable(adjective, characteristic, importance, significance, weight)
7
focus(noun, adjective, characteristic, influence, importance)
7
consequential(adjective, characteristic, influence, importance)
6
weighty(adjective, characteristic, weight, heaviness)
5
hefty(adjective, characteristic, weight, heaviness)
5
useful(adjective, characteristic, influence, importance)
4
difficult(adjective, characteristic, importance, significance)
4
hard(adjective, characteristic, importance, significance)
4
meaningful(adjective, characteristic, importance, significance)
4
serious(adjective, characteristic, importance, significance)
4
tough(adjective, characteristic, importance, significance)
3
abundant(adjective, characteristic, weight, heaviness)
3
beefy(adjective, characteristic, weight, heaviness)
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APASmart Define. (2015). lightweight thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/lightweight/thesaurus/antonyms
ChicagoSmart Define. 2015. "lightweight thesaurus" https://smartdefine.org/lightweight/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2015, lightweight thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/lightweight/thesaurus/antonyms>.
MLASmart Define. "lightweight thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/lightweight/thesaurus/antonyms>