18
appalling(adjective, taste, awful, terrible, horrible)
15
awful(adjective, terrible, horrible, afraid)
12
profound(adjective, complete, deep, surface, extent)
12
dreadful(adjective, awful, terrible, horrible, afraid)
11
deep(adjective, complete, difficult, down, deep)
11
bottomless(adjective, complete, deep, extent, infinite)
11
unfathomable(adjective, complete, deep, extent, profound)
10
abyssal(adjective, broad, far, wide, unfathomable)
8
fathomless(adjective, deep, depth, deeply, bottomless)
7
hellish(adjective, taste, awful, terrible, horrible)
6
nasty(adjective, taste, awful, terrible, horrible)
6
odious(adjective, taste, awful, terrible, horrible)
6
terrible(adjective, awful, dreadful)
6
tremendous(adjective, awful, terrible, horrible, afraid)
5
atrocious(adjective, awful, terrible, horrible, afraid)
5
bad(adjective, awful, terrible, horrible, afraid)
5
dire(adjective, awful, terrible, horrible, afraid)
5
frightful(adjective, awful, terrible, horrible, afraid)
5
ghastly(adjective, awful, terrible, horrible, afraid)
5
gruesome(adjective, taste, awful, terrible, horrible)
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APASmart Define. (2015). abysmal thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/abysmal/thesaurus/synonyms
ChicagoSmart Define. 2015. "abysmal thesaurus" https://smartdefine.org/abysmal/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, abysmal thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/abysmal/thesaurus/synonyms>.
MLASmart Define. "abysmal thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/abysmal/thesaurus/synonyms>