There are 12 13-letter words that end with 'nous'.
| autochthonous | arteriovenous |
| cartilaginous | diathermanous |
| multitudinous | nonindigenous |
| nonleguminous | platitudinous |
| plenitudinous | rectitudinous |
| prolegomenous | subbituminous |
Note: These 12 13-letter words that end with 'nous' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with inous, enous, onous, anous, ynous, rnous, nnous, gnous.
6-letter words end with 'nous' (2)