2
honestly
2
indeed(adverb, affirmation)
2
actually
2
all joking aside(expression, idiom, adverb, actively, truly)
2
animatedly(adverb, fast, intensely, fiercely, vigorously)
2
ardently(vigorously, earnestly, hastily, carefully, eagerly)
2
awfully
2
briskly(adverb, fast, intensely, fiercely, vigorously)
2
certainly
2
dependably
2
deplorably
2
desperately
2
determinedly(adverb, earnestly, actively, truly, thoughtfully)
2
down(adverb, earnestly, actively, truly, thoughtfully)
2
earnest
2
energetically(adverb, fast, intensely, fiercely, vigorously)
2
essentially(adverb, greatness)
2
firmly(adverb, fast, badly, severely, intensely)
2
for real(expression, adverb, earnestly, actively, truly)
2
furiously(adverb, fast, sprightly, severely, intensely)
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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>