Unique, singular, sui generis.

A unique example.

(card games) Four cards of the same rank.

(card games) A hand including three cards of the same rank.

To act cruelly in order to achieve a positive outcome in the future.

plural of one-of-a-kind

plural of one of a kind

plural of benefit in kind

Two who are very similar. / (card games) A combination of two cards of the same rank. / (card games) A hand in which the best combination is two of a kind.

(card games) five cards of the same rank, often only possible if one or more wild cards are being used.