There are 10 words that start with 'polyh'.
| polyhedra | polyhedral | polyhedron | 
| polyhistor | polyhedrons | polyhistors | 
| polyhydroxy | polyhedroses | polyhedrosis | 
| polyhistoric | ||
Note: These 10 words that start with 'polyh' are found from the USA & Canada version of the tournament Scrabble word list.