doubtlessly

Adverb

without doubt; certainly

Adv

Without question; indubitably.
Without feeling doubt, without misgivings.

Examples

There are doubtlessly more insects than mammals.

Origin / Etymology

From Middle English doutelesly, dowtelesly, equivalent to doubtless + -ly.

Synonyms

doubtless, undoubtedly

Scrabble Score: 17

doubtlessly: valid Scrabble (US) TWL Word
doubtlessly: valid Scrabble Word in Merriam-Webster MW Dictionary
doubtlessly: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 20

doubtlessly: valid Words With Friends Word