47 entries under behaviour topic. ×

123
gloomy(adjective, feature, description, characteristics, characteristic)
53
dismal(adjective, gloomy, feature, sorrow, woe)
45
dreary(adjective, bad, sad, sorrow, woe)
44
sombre(adjective, pitch, black, inky, clouded)
36
bleak(adjective, depressing, feature, description, grim)
31
cheerless(adjective, unhappy, depressing, feature, dull)
30
grim(adjective, gloomy, depressing, feature, dull)
22
dour(adjective, feature, character, sadness, description)
22
drab(adjective, dull, bay, buff, feature)
22
threatening(adjective, feature, character, gloomy, description)
21
sullen(adjective, dull, gloomy, black, character)
21
funereal(adjective, depressing, dull, black, character)
20
morose(adjective, character, personality, gloomy)
20
glum(adjective, character, personality, sadness)
19
joyless(adjective, sad, depressing, feature, dull)
19
mournful(adjective, sad, sorrow, woe, gloomy)
18
glowering(adjective, character, personality, upset)
18
lugubrious(adjective, sorrow, woe, sad, depression)
17
ominous(adjective, character, personality, upset)
15
doleful(adjective, sorrow, woe, bad, sad)
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APASmart Define. (2016). dark thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/dark/thesaurus/synonyms
ChicagoSmart Define. 2016. "dark thesaurus" https://smartdefine.org/dark/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2016, dark thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/dark/thesaurus/synonyms>.
MLASmart Define. "dark thesaurus" 3 April 2016. Web. 21 September 2026. <https://smartdefine.org/dark/thesaurus/synonyms>