Tweedledee and Tweedledum, Tweedledum and Tweedledee - any two people who are hard to tell apart

set - a group of things of the same kind that belong together and are so used; "a set of books"; "a set of golf clubs"; "a set of teeth"

2, II, two, deuce - the cardinal number that is the sum of one and one or a numeral representing this number

doubleton - (bridge) a pair of playing cards that are the only cards in their suit in the hand dealt to a player

assemblage, gathering - a group of persons together in one place

twosome, couple, duet, duo - a pair who associate with one another; "the engaged couple"; "an inseparable twosome"

yoke - a pair of draft animals joined by a yoke; "pulled by a yoke of oxen"

poker hand - the 5 cards held in a game of poker

unite, unify - act in concert or unite in a common purpose or belief

match - give or join in marriage

mismate - provide with an unsuitable mate

mismatch - match badly; match two objects or people that do not go together

bring together, join - cause to become joined or linked; "join these two parts so that they fit together"

geminate, pair - arrange in pairs; "Pair these numbers"

occur - to be found to exist; "sexism occurs in many workplaces"; "precious stones occur in a large area in Brazil"

arrange, set up - put into a proper or systematic order; "arrange the books on the shelves in chronological order"

geminate, pair - occur in pairs

nick - mate successfully; of livestock

conjoin, join - make contact or come together; "The two roads join here"

bonk, do it, eff, fuck, get it on, get laid, have a go at it, have intercourse, have it away, have it off, have sex, be intimate, lie with, make love, roll in the hay, screw, sleep with, hump, jazz, love, bed, bang, make out, know - have sexual intercourse with; "This student sleeps with everyone in her dorm"; "Adam knew Eve"; "Were you ever intimate with this man?"

tread - mate with; "male birds tread the females"

service, serve - mate with; "male animals serve the females for breeding purposes"

deflower, ruin - deprive of virginity; "This dirty old man deflowered several young girls in the village"

mount, ride - copulate with; "The bull was riding the cow"

backcross - mate a hybrid of the first generation with one of its parents

breed, cover - copulate with a female, used especially of horses; "The horse covers the mare"

bugger, sodomise, sodomize - practice anal sex upon

sodomise, sodomize - copulate with an animal