There are 11 12-letter words that end with 'lous'.
| anemophilous | anthophilous | collembolous |
| coprophilous | hygrophilous | mesophyllous |
| microvillous | gamopetalous | nonfrivolous |
| polypetalous | unscrupulous | |
Note: These 11 12-letter words that end with 'lous' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with ulous, alous, ilous, llous, olous, elous, ylous, blous, rlous.
6-letter words end with 'lous' (1)