MUCRO is a playable word

mucro Scrabble® Dictionary

noun
pl. mucrones or mucros
a sharp point at the end of certain plant and animal organs
19 Playable Words can be made from "MUCRO"
   2-Letter Words (5 found)
   3-Letter Words (11 found)
   4-Letter Words (1 found)
   5-Letter Words (2 found)