There are 13 words that start with 'euca'.
| eucaine | eucaines | eucalypt |
| eucalypti | eucalypts | eucaryote |
| eucalyptol | eucalyptus | eucaryotes |
| eucalyptole | eucalyptols | eucalyptoles |
| eucalyptuses | ||
Note: These 13 words that start with 'euca' are found from the USA & Canada version of the tournament Scrabble word list.