Yes, dare is in the scrabble dictionary

Dare Definition

noun

An act of daring; a challenge.

An act or instance of daring .

Imaginative or vivacious boldness .

verb-intransitive

To be courageous or bold enough to do or try something: Go ahead and dive if you dare.

auxiliary-verb

To be courageous or bold enough to: I dare not say. How dare she go?.

verb-transitive

To challenge (someone) to do something requiring boldness: They dared me to dive off the high board.

To confront or oppose boldly. See Synonyms at defy.

To have the courage required for: The gymnast dared a breathtakingly difficult move.

abbreviation

Dictionary of American Regional English.