71 entries under dreadful topic. ×

91
serious(adjective, characteristic, calm, dull, quiet)
43
grievous(adjective, help, bad, hard, great)
23
nasty(adjective, hard, difficult, unpleasant, complex)
19
rough(adjective, hard, difficult, unpleasant, complex)
18
messy(adjective, hard, difficult, unpleasant, complex)
15
dangerous(adjective, help, great, tough, severe)
14
dour(adjective, dull, quiet, severe, harsh)
14
gloomy(adjective, dull, bad, sad, unhappy)
12
dark(adjective, calm, dull, quiet, bad)
11
saturnine(adjective, dull, quiet, severe, unpleasant)
9
major(adjective, great, tough, severe, unpleasant)
8
terrible(adjective, severe, intense, unpleasant, horrible)
8
ugly(adjective, tough, severe, unpleasant, deep)
7
ominous(adjective, unpleasant, property, horrible, disagreeable)
7
threatening(adjective, tough, severe, unpleasant, deep)
7
vile(adjective, severe, intense, unpleasant, horrible)
7
wretched(adjective, unhappy, unpleasant, gloomy, miserable)
6
morose(adjective, unhappy, unpleasant, sorrow, gloomy)
6
sullen(adjective, sad, unpleasant, sorrow, depression)
5
low(adjective, quiet, strong, hard, gentle)
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APASmart Define. (2016). grave thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/grave/thesaurus/synonyms
ChicagoSmart Define. 2016. "grave thesaurus" https://smartdefine.org/grave/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2016, grave thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/grave/thesaurus/synonyms>.
MLASmart Define. "grave thesaurus" 29 March 2016. Web. 24 September 2026. <https://smartdefine.org/grave/thesaurus/synonyms>