150 entries under substantial topic. ×

1
physical(adjective, strong, hard, compact)
1
plenty(great, rich, abundant, extensive)
1
primary(order, big, important, significant)
1
reinforced(adjective, strong, sound, tough, solid)
1
relevant(adjective, great, big, significant)
1
salient(big, important, significant, valuable)
1
secure(adjective, strong, hard, sound, tough)
1
sinewy(adjective, strong, sound, tough, solid)
1
something(big, outstanding, significant, valuable)
1
standout(great, extraordinary, big, significant)
1
stark(adjective, strong, sound, tough, solid)
1
staunch(adjective, strong, sound, tough, solid)
1
sufficient(great, rich, plenty, plentiful)
1
tight(adjective, strong, hard, compact)
1
towering(adjective, severe, large, huge)
1
underlined(adjective, big, unusual, important, exceptional)
1
valuable(big, significant, large, vital)
0
big deal(expression, big)
0
brick wall(expression, adjective, strong, hard)
0
determining(big, significant, valuable, vital)
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APASmart Define. (2016). heavy thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/heavy/thesaurus/synonyms
ChicagoSmart Define. 2016. "heavy thesaurus" https://smartdefine.org/heavy/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, heavy thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/heavy/thesaurus/synonyms>.
MLASmart Define. "heavy thesaurus" 25 January 2016. Web. 25 September 2026. <https://smartdefine.org/heavy/thesaurus/synonyms>