There are 10 words that start with 'coatt'.
| coattail | coattend | coattest | 
| coattails | coattends | coattests | 
| coattended | coattested | coattending | 
| coattesting | ||
Note: These 10 words that start with 'coatt' are found from the USA & Canada version of the tournament Scrabble word list.