There are 17 words that end with 'llus'.
| callus | gallus |
| villus | ocellus |
| phallus | thallus |
| bacillus | entellus |
| lapillus | nucellus |
| vitellus | pulvillus |
| prothallus | aspergillus |
| microvillus | lactobacillus |
| streptobacillus | |
Note: These 17 words that end with 'llus' are found from the USA & Canada version of the tournament Scrabble word list.