Term: barbershop quartet: an unaccompanied quartet of (usually male) voices singing sentimental songs in four-part harmony
Broader: quartet: four performers or singers who perform together | Unrelated: trouser press: a home appliance in which trousers can be hung and the wrinkles pressed out
Broader: quartet: four performers or singers who perform together | Unrelated: hyracotherium: extinct horse genus; formerly called eohippus
Broader: quartet: four performers or singers who perform together | Unrelated: catenary: the curve theoretically assumed by a perfectly flexible and inextensible cord of uniform density and cross section hanging freely from two fixed points
Broader: quartet: four performers or singers who perform together | Unrelated: apodidae: swifts; in former classifications included in the order Coraciiformes
Broader: quartet: four performers or singers who perform together | Unrelated: malinois: fawn-colored short-haired sheepdog
Broader: quartet: four performers or singers who perform together | Unrelated: belay: something to which a mountain climber's rope can be secured
Broader: quartet: four performers or singers who perform together | Unrelated: far cry: a disappointing disparity
Broader: quartet: four performers or singers who perform together | Unrelated: buzzer: a signaling device that makes a buzzing sound
Broader: quartet: four performers or singers who perform together | Unrelated: spotted gum: large gum tree with mottled bark
Broader: quartet: four performers or singers who perform together | Unrelated: garbage collection: the collection and removal of garbage