14 entries under thoroughly topic. ×

12
rigidly(adverb, well, strongly, firmly)
5
solidly(adverb, severely, strongly, firmly)
5
tightly(adverb, severely, strongly, firmly)
2
enduringly(adverb, well, severely, strongly)
2
securely(adverb, severely, strongly, firmly)
1
durably(adverb, well, severely, strongly)
1
fixedly(adverb, severely, strongly, firmly)
1
like a rock(expression, idiom, adverb, strongly)
1
motionlessly(adverb, well, severely, strongly)
1
solid(adverb, well, severely, strongly)
1
soundly(adverb, well, severely, strongly)
1
stably(adverb, well, severely, strongly)
1
unflinchingly(adverb, well, severely, strongly)
1
unshakeably(adverb, well, severely, strongly)
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APASmart Define. (2015). stiffly thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/stiffly/thesaurus/synonyms
ChicagoSmart Define. 2015. "stiffly thesaurus" https://smartdefine.org/stiffly/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, stiffly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/stiffly/thesaurus/synonyms>.
MLASmart Define. "stiffly thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/stiffly/thesaurus/synonyms>