6
heavily(adverb, heavily, laboriously)
4
massively(adverb, heavily)
4
ponderously(adverb, heavily)
3
powerfully
2
bigly
2
burdensomely
2
gravely
2
heftily
2
importantly
2
momentously
2
onerously
2
seriously
2
severely
2
significantly
2
substantially
1
cogently
1
concentrically
1
consequentially
1
corpulently
1
critically
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APASmart Define. (2015). weightily thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/weightily/thesaurus/synonyms
ChicagoSmart Define. 2015. "weightily thesaurus" https://smartdefine.org/weightily/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, weightily thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/weightily/thesaurus/synonyms>.
MLASmart Define. "weightily thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/weightily/thesaurus/synonyms>