114 entries under severely topic. ×

16
strictly
10
grimly
9
severely(adverb, fast, just, absolutely, sprightly)
8
precisely(adverb, thoroughly, fully, completely)
7
meticulously(adverb, thoroughly, fully, precisely)
6
correctly(adverb, really, thoroughly, fully)
6
exactingly(adverb, fastidiously)
6
harshly
6
sternly
5
austerely
5
conscientiously(adverb, thoroughly, fully, precisely)
5
dourly
5
intensely(adverb, fast, sprightly, seriously)
5
stringently
4
punctiliously(adverb, thoroughly, fully, precisely)
4
relentlessly(adverb, fast, sprightly, seriously)
4
sharply(adverb, fast, sprightly, seriously)
3
absolutely(adverb, just, completely, quite)
3
ascetically
3
firmly(adverb, fast, badly, intensely)
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APASmart Define. (2015). rigorously thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/rigorously/thesaurus/synonyms
ChicagoSmart Define. 2015. "rigorously thesaurus" https://smartdefine.org/rigorously/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, rigorously thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/rigorously/thesaurus/synonyms>.
MLASmart Define. "rigorously thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/rigorously/thesaurus/synonyms>