There are 10 words that end with 'atrix'.
| matrix | oratrix | 
| aviatrix | cicatrix | 
| mediatrix | fellatrix | 
| testatrix | dominatrix | 
| generatrix | administratrix | 
Note: These 10 words that end with 'atrix' are found from the USA & Canada version of the tournament Scrabble word list.