Answer (1 of 8): Spinster suggests a woman who is not just unmarried but who is unlikely to ever be married, especially because of her age. Spinster is an old fashioned and rather offensive term. Bachelor, by itself, refers to an unmarried man but lacks the suggestion that he will remain unmarri.

Male: Female: Tadpole Polliwog Froglet: Army Knot: Gerbil: Buck: Doe: Pup: Horde: Giraffe: Bull: Doe: Calf: Corps Group Herd Tower: Gnat: Male: Female: Larva: Cloud Horde: Gnu: Bull: Cow: Calf: Herd: Goat: Billy Buck: Nanny: Kid: Herd Tribe: Goose: Goose: Gander: Gosling: Flock Gaggle Skein (in flight) Wedge ('V' flight) Gorilla: Male: Female.