Singleton \Sin"gle*ton\, n. In certain games at cards, as whist, a single card of any suit held at the deal by a player; as, to lead a singleton. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

45 Moby Thesaurus words for "singleton": ace, article, best bower, bower, cards, clubs, deck, deuce, diamonds, dummy, entity, face cards, flush, full house, hand, hearts, individual, integer, item, jack, joker, king, knave, left bower, module, pack, pair, person, persona, picture cards, playing cards, point, queen, round, royal flush, rubber, ruff, single, soul, spades, straight, trey, trick, trump, unit

Source: Moby Thesaurus II by Grady Ward, 1.0
 

singleton

Source: WordNet (r) 2.0
 

Singleton \Sin"gle*ton\, n. In certain games at cards, as whist, a single card of any suit held at the deal by a player; as, to lead a singleton.

Source: Webster's Revised Unabridged Dictionary (1913)