tailbone

Noun

The final fused vertebrae at the base of the spine; the coccyx.
pl. -S the coccyx

Origin / Etymology

From tail + bone.

Scrabble Score: 10

tailbone: valid Scrabble (US) TWL word
tailbone: valid Scrabble Word in Merriam-Webster MW Dictionary
tailbone: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 13

tailbone is a valid Words With Friends word