Pair: two cards of the same denomination, and three unmatched cards.

Two Pairs: two cards of one denomination, two cards of another denomination, and one unmatched card.

Three of a Kind or "threes": three cards of the same denomination, and two unmatched cards.

Straight: five cards in sequence but not of the same suit.

Flush: five cards of the same suit, but not in sequence.

Full House: three cards of one denomination, and two cards of another denomination.

Four of a Kind or "fours": four cards of the same denomination, and one unmatched card.

Straight Flush: five cards in sequence of the same suit.

Royal Flush: Ten, Jack, Queen, King, Ace of the same suit.