16 entries under definitely topic. ×

6
firmly(adverb, firm, severely, thoroughly, strongly)
5
fast(adjective, firm, thoroughly, strongly, firmly)
2
durably(adverb, well, severely, thoroughly, strongly)
1
enduringly(adverb, well, severely, thoroughly, strongly)
1
hard(firm, strongly, firmly, resolutely)
1
motionlessly(adverb, well, severely, thoroughly, strongly)
1
rigidly(adverb, well, severely, thoroughly, strongly)
1
solid(adverb, well, severely, thoroughly, strongly)
1
stably(adverb, well, severely, thoroughly, strongly)
1
steadily(firm, strongly, firmly, resolutely)
1
stiffly(adverb, well, severely, thoroughly, strongly)
1
tight(hard, firm, thoroughly, strongly, firmly)
1
unflinchingly(adverb, well, severely, thoroughly, strongly)
1
unshakeably(adverb, well, severely, thoroughly, strongly)
0
steadfastly(hard, firm, firmly, resolutely)
0
tenaciously(firm, firmly, resolutely, inflexibly)
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APASmart Define. (2015). soundly thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/soundly/thesaurus/synonyms
ChicagoSmart Define. 2015. "soundly thesaurus" https://smartdefine.org/soundly/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, soundly thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/soundly/thesaurus/synonyms>.
MLASmart Define. "soundly thesaurus" 14 April 2015. Web. 23 September 2026. <https://smartdefine.org/soundly/thesaurus/synonyms>