59 entries under significant topic. ×

1
astronomical(substantial, large, huge, immense)
1
heavyweight(adjective, heavy, large, considerable)
1
mondo(substantial, large)
1
reasonable(suitable, substantial, large, acceptable)
1
tolerable(adjective, good, reasonable, fair)
1
valuable(adjective, strong, smart, solid, big)
0
appreciable(reasonable, substantial, large, adequate)
0
big-deal(large, considerable)
0
distinguished(substantial, large)
0
doozie(substantial, large)
0
durable(large, considerable)
0
dynamite(substantial, large)
0
essential(substantial, large)
0
extraordinary(large, considerable)
0
fab(substantial, large)
0
firm(large, considerable)
0
influential(substantial, large)
0
key(large, considerable)
0
major-league(large, considerable)
0
marked(substantial, large)
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APASmart Define. (2016). ample thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/ample/thesaurus/synonyms
ChicagoSmart Define. 2016. "ample thesaurus" https://smartdefine.org/ample/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2016, ample thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/ample/thesaurus/synonyms>.
MLASmart Define. "ample thesaurus" 29 March 2016. Web. 20 September 2026. <https://smartdefine.org/ample/thesaurus/synonyms>