The difference between Doubtlessly and Undoubtably
When used as adverbs, doubtlessly means without question, whereas undoubtably means without doubt.
check bellow for the other definitions of Doubtlessly and Undoubtably
-
Doubtlessly as an adverb (sometimes, proscribed):
Without question; indubitably.
Examples:
"There are doubtlessly more insects than mammals."
-
Undoubtably as an adverb (sometimes, _, considered, _, nonstandard):
Without doubt; indubitably, undoubtedly.