Synonyms for Quintet (same or very similar meaning)
WordNet sense 1 (the cardinal number that is the sum of four and one):
fin, five, phoebe, quint, quintuplet, v, pentad, cinque, fivesome, Little PhoebeWordNet sense 2 (five performers or singers who perform together):
quintetteWordNet sense 3 (a set of five similar things considered as a unit):
quintupleFrom the ODE community, based on WordNetadd/edit