abutment
complimenttestamentretirementcondimentcementjudgmentpavementsentimentcontentmentanti-disestablishmentembarrassmentstatementapartmentexperimentreplacementembroilment
Rotates
abacus, ananas
promenades
Oppo
flung?
oxeye
nitrate, lettuce, coterie
spore
To list a few: Surplus. Surpass.
A thirteen letter word that ends with tending: overextending
Excommunicate is a 13 letter word. It begins and ends with the letter e.