PROTHORAX Scrabble 21 Words With Friends 21 Scrabble letter values: P3R1O1T1H4O1R1A1X8 = 21 Definition noun the anterior part of an insect's thorax. Examples “bears the first pair of legs” See all 105 words you can make from PROTHORAX → 9-letter words Words starting with P Words ending with X ← Unscramble different letters