2
mighty(adjective, strong, powerful, huge, forceful)
2
myriad
2
navigable(adjective, clear, free, bare, accessible)
2
numberless(adjective, complete, absolute, unrestrained, infinite)
2
overgrown
2
overlong(adjective, great, high, long, vast)
2
plenary(top, perfect, broad, maximum, highest)
2
plenteous(great, perfect, substantial, adequate, abundant)
2
preponderant
2
prevailing(adjective, common, general, accepted, dominant)
2
prolonged(adjective, great, big, deep, high)
2
radical
2
rich(adjective, great, heavy, substantial, green)
2
serious(big, significant, substantial, large, valuable)
2
significant(adjective, big, substantial, large, valuable)
2
spatial
2
spread out(expression, adjective, clear, great, free)
2
staggering
2
stretched(adjective, open, great, deep, high)
2
tall(adjective, great, deep, high, remote)
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APASmart Define. (2016). extensive thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/extensive/thesaurus/synonyms
ChicagoSmart Define. 2016. "extensive thesaurus" https://smartdefine.org/extensive/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, extensive thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/extensive/thesaurus/synonyms>.
MLASmart Define. "extensive thesaurus" 29 March 2016. Web. 21 September 2026. <https://smartdefine.org/extensive/thesaurus/synonyms>