1
all-encompassing(adjective, complete, absolute, unrestrained, extensive)
1
cavernous
1
colossal
1
countless(adjective, complete, absolute, unrestrained, extensive)
1
deep
1
deep as hell(expression, idiom)
1
enigmatic
1
enormous
1
ethereal(adjective, deep, wide)
1
full(adjective, complete, absolute, unrestrained, extensive)
1
full-out(adjective, complete, absolute, unrestrained, extensive)
1
full-scale(adjective, complete, absolute, unrestrained, extensive)
1
fundamental
1
gaping
1
gargantuan
1
hard
1
immeasurable
1
incalculable
1
incognizable
1
incomprehensible(adjective, complete, absolute, unrestrained, extensive)
11 years ago|1.2k views|share |citing 
APASmart Define. (2015). unfathomed thesaurus. Retrieved September 29, 2026, from https://smartdefine.org/unfathomed/thesaurus/synonyms
ChicagoSmart Define. 2015. "unfathomed thesaurus" https://smartdefine.org/unfathomed/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, unfathomed thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/unfathomed/thesaurus/synonyms>.
MLASmart Define. "unfathomed thesaurus" 14 April 2015. Web. 29 September 2026. <https://smartdefine.org/unfathomed/thesaurus/synonyms>