15
stiffly(adverb, well, thoroughly, strongly, firmly)
11
firmly(adverb, severely, strongly, definitely, strictly)
8
inflexibly(adverb, thoroughly, strongly, firmly, definitely)
7
unyieldingly(adverb, obstinately, inelastically)
6
immovably(adverb, thoroughly, strongly, firmly, definitely)
6
strictly(adverb, definitely, resolutely, inflexibly)
5
adamantly(adverb, obstinately)
5
bolt
5
grimly
5
rigorously
5
solidly(adverb, severely, thoroughly, strongly, firmly)
5
tightly(adverb, severely, thoroughly, strongly, firmly)
4
exactly
4
hardly
4
intransigently
4
precisely
4
sternly
4
unalterably(adverb, inelastically)
4
uncompromisingly
3
directly
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APASmart Define. (2015). rigidly thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/rigidly/thesaurus/synonyms
ChicagoSmart Define. 2015. "rigidly thesaurus" https://smartdefine.org/rigidly/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, rigidly thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/rigidly/thesaurus/synonyms>.
MLASmart Define. "rigidly thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/rigidly/thesaurus/synonyms>