Spinster
unmarried woman, often older
A spinster is an older word for an unmarried woman. A word used more often today is "single woman" or bachelorette.
Other meanings
changeA spinster is also someone who spins yarn from wool using a spinning wheel. Spinsters use the yarn to make clothes like a tailor, seamster, seamstress. One famous spinster is the girl in the story of Rumpelstiltskin.