There are 13 words that end with 'olous'.
| frivolous | variolous |
| nidicolous | saxicolous |
| arenicolous | calcicolous |
| terricolous | unfrivolous |
| collembolous | nonfrivolous |
| cavernicolous | hemimetabolous |
| holometabolous | |
Note: These 13 words that end with 'olous' are found from the USA & Canada version of the tournament Scrabble word list.