30 entries under grimly topic. ×

11
actively(adverb, fast, seriously, intensely, fiercely)
9
resolutely(adverb, fully, seriously, earnestly, actively)
9
zealously(adverb, seriously, earnestly, actively, hastily)
6
fervently(adverb, seriously, earnestly, actively, heartily)
4
earnestly(adverb, fast, seriously, intensely, fiercely)
4
passionately(adverb, seriously, earnestly, actively, readily)
3
intently(adverb, seriously, earnestly, actively, heartily)
3
purposefully(adverb, thoroughly, seriously, earnestly, actively)
3
seriously(adverb, fast, intensely, fiercely, earnestly)
1
all joking aside(expression, idiom, adverb, seriously, earnestly)
1
cool it(expression, adverb, seriously, earnestly, actively)
1
determinedly(adverb, seriously, earnestly, actively, truly)
1
down(adverb, seriously, earnestly, actively, truly)
1
for real(expression, adverb, seriously, earnestly, actively)
1
gravely(adverb, seriously, earnestly, actively, powerfully)
1
in all conscience(expression, idiom, adverb, seriously, earnestly)
1
in all seriousness(expression, idiom, adverb, seriously, earnestly)
1
in earnest(expression, adverb, seriously, earnestly, actively)
1
not humorously(expression, adverb, seriously, earnestly, actively)
1
sedately(adverb, seriously, earnestly, actively, truly)
<12>
11 years ago|9.2k views|share |citing 
APASmart Define. (2015). vigorously thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/vigorously/thesaurus/synonyms
ChicagoSmart Define. 2015. "vigorously thesaurus" https://smartdefine.org/vigorously/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, vigorously thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/vigorously/thesaurus/synonyms>.
MLASmart Define. "vigorously thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/vigorously/thesaurus/synonyms>