Is “Soundly” a Scrabble word?
Yes
SOUNDLY
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Soundly
/ˈsaʊnd.lɪ/
adverb
1.In a thorough manner; in manner free of defect or deficiency.
“He was soundly thrashed by the semi-professional boxer.”
Synonyms: completely, deeply, firmly, fully, perfectly, roundly