106 entries under substantial topic. ×

1
serious(big, unusual, significant, valuable)
1
sizable(significant, definite, large, considerable)
1
something(big, significant, large, valuable)
1
something else(expression, unusual, large, serious)
1
standout(adjective, great, big, wonderful, exceptional)
1
tangible(plain, exact, significant, definite)
1
urgent(big, significant, valuable, vital)
1
venerable(adjective, great, famous, outstanding, significant)
1
vital(big, significant, valuable, imperative)
1
weighty(solid, extraordinary, unusual, powerful, significant)
0
abundant(significant, large)
0
ample(significant, large)
0
ascertainable(significant, definite, considerable)
0
astronomical(significant, large)
0
bountiful(significant, large)
0
comfortable(significant, large)
0
commodious(significant, large)
0
consequential(significant, large)
0
critical(big, significant, valuable, vital)
0
doozie(significant, large)
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APASmart Define. (2015). marked thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/marked/thesaurus/synonyms
ChicagoSmart Define. 2015. "marked thesaurus" https://smartdefine.org/marked/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, marked thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/marked/thesaurus/synonyms>.
MLASmart Define. "marked thesaurus" 17 July 2015. Web. 23 September 2026. <https://smartdefine.org/marked/thesaurus/synonyms>