2
unquestioningly
2
very
2
vivaciously(adverb, fast, intensely, fiercely, vigorously)
2
weightily
2
wholeheartedly
2
zealously(adverb, vigorously, earnestly, hastily, truly)
1
actively intently(expression, vigorously, earnestly, hastily, carefully)
1
adeptly
1
affectingly(adverb, severely, thoroughly, completely, intensely)
1
agilely(vigorously, earnestly, actively, hastily, carefully)
1
angrily(adverb, fast, sprightly, severely, intensely)
1
arduously(vigorously, earnestly, actively, hastily, carefully)
1
ascetically
1
assent
1
assiduously(vigorously, earnestly, actively, hastily, carefully)
1
assuredly
1
atrociously
1
austere
1
austerely
1
bec et ongles(expression, idiom)
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APASmart Define. (2016). seriously thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/seriously/thesaurus/synonyms
ChicagoSmart Define. 2016. "seriously thesaurus" https://smartdefine.org/seriously/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, seriously thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/seriously/thesaurus/synonyms>.
MLASmart Define. "seriously thesaurus" 31 March 2016. Web. 22 September 2026. <https://smartdefine.org/seriously/thesaurus/synonyms>