There are 12 words that start with 'underh'.
| underhair | underhand |
| underheat | underhung |
| underhairs | underhands |
| underheats | underhanded |
| underheated | underheating |
| underhandedly | underhandedness |
Note: These 12 words that start with 'underh' are found from the USA & Canada version of the tournament Scrabble word list.