2
heavily(adverb, inactivity)
2
intensely
2
lustily
2
perfectly
2
plausibly(adverb, reasonably)
2
reliably
2
rightly
2
safely
2
sound
2
strongly
2
validly
2
wisely(adverb, reasonably)
1
acoustically
1
adeptly
1
advisably
1
arduously
1
articulately
1
beneficially
1
benevolently
1
canonically
11 years ago|4.9k views|share |citing 
APASmart Define. (2015). soundly thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/soundly/thesaurus/synonyms
ChicagoSmart Define. 2015. "soundly thesaurus" https://smartdefine.org/soundly/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, soundly thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/soundly/thesaurus/synonyms>.
MLASmart Define. "soundly thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/soundly/thesaurus/synonyms>