Words Containing R and Ending in PON

Making a list of words with R that end in PON? Sounds fun. Also sounds pretty specific. A list like that could go a long way, we're sure. This complete word list is tailored to your search parameters, whether they are words with R or words that end in PON. Or both, obviously.

11 letter words1 Word
superweapon
9 letter words2 Words
thereupon
whereupon
8 letter words2 Words
hereupon
prosopon
7 letter words3 Words
crampon
croupon
strapon
6 letter words3 Words
crepon
fripon
tarpon