stud

noun

1
poker in which each player receives hole cards and the remainder are dealt face up; bets are placed after each card is dealt
2
adult male horse kept for breeding
3
an upright in house framing
4
ornament consisting of a circular rounded protuberance (as on a vault or shield or belt)
5
a man who is virile and sexually active

Also useful for “stud”:Unscrambler— Turn loose letters into real words