111 entries under serious topic. ×

49
severe(adjective, calm, quiet, help, hard)
46
weighty(adjective, dull, hard, great, tough)
46
solemn(adjective, characteristic, calm, dull, quiet)
43
grievous(adjective, help, bad, hard, great)
41
sad(adjective, hard, difficult, complex, gloomy)
34
important(adjective, great, tough, severe, importance)
31
sober(adjective, characteristic, calm, dull, quiet)
27
earnest(adjective, characteristic, calm, dull, quiet)
24
hard(adjective, tough, severe, difficult, harsh)
23
sedate(adjective, characteristic, calm, dull, quiet)
20
consequential(adjective, harsh, importance, big, heavy)
20
grim(adjective, sorrow, gloomy, depress, sadness)
17
staid(adjective, characteristic, calm, dull, quiet)
17
crucial(adjective, great, tough, severe, big)
16
significant(adjective, great, tough, severe, importance)
16
somber(adjective, calm, dull, quiet, cool)
15
dangerous(adjective, help, great, tough, severe)
14
dignified(adjective, characteristic, calm, dull, quiet)
14
dour(adjective, dull, quiet, severe, harsh)
14
thoughtful(adjective, characteristic, severe, honest, gloomy)
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APASmart Define. (2016). grave thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/grave/thesaurus/synonyms
ChicagoSmart Define. 2016. "grave thesaurus" https://smartdefine.org/grave/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2016, grave thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/grave/thesaurus/synonyms>.
MLASmart Define. "grave thesaurus" 29 March 2016. Web. 25 September 2026. <https://smartdefine.org/grave/thesaurus/synonyms>