There are 12 words that end with 'tenes'.
butenes | ketenes | retenes |
haptenes | pentenes | carotenes |
zygotenes | diplotenes | eleoptenes |
leptotenes | isobutenes | pachytenes |
Note: These 12 words that end with 'tenes' are found from the USA & Canada version of the tournament Scrabble word list.