50 entries under severely topic. ×

18
harshly
17
severely
15
grimly(adverb, seriously)
10
strictly
9
rigorously
7
austerely(adverb, seriously, grimly)
5
sharply
5
dourly
5
stringently
4
acerbically
3
exactingly
3
curtly
3
cuttingly
3
dryly
3
seriously(adverb, badly, actively, truly)
2
ascetically
2
starkly
2
bleakly
2
abruptly
2
acrimoniously
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APASmart Define. (2015). sternly thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/sternly/thesaurus/synonyms
ChicagoSmart Define. 2015. "sternly thesaurus" https://smartdefine.org/sternly/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, sternly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/sternly/thesaurus/synonyms>.
MLASmart Define. "sternly thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/sternly/thesaurus/synonyms>