1
decisively
1
decorously
1
deep
1
deliberately
1
demonstrably
1
devotedly
1
diligently(vigorously, earnestly, actively, hastily, carefully)
1
discern
1
distressingly(adverb, badly, severely, thoroughly, completely)
1
downright
1
drably
1
dreadful
1
dully
1
eagerly(vigorously, earnestly, actively, hastily, carefully)
1
earnestness
1
egad
1
enthusiastically(vigorously, earnestly, actively, hastily, carefully)
1
entirely
1
estimably
1
eventfully
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APASmart Define. (2016). seriously thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/seriously/thesaurus/synonyms
ChicagoSmart Define. 2016. "seriously thesaurus" https://smartdefine.org/seriously/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2016, seriously thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/seriously/thesaurus/synonyms>.
MLASmart Define. "seriously thesaurus" 31 March 2016. Web. 23 September 2026. <https://smartdefine.org/seriously/thesaurus/synonyms>