What words end with ussion?

There are no common English words that end in "ussion". This is likely because the combination of "us" and "sion" doesn't form a typical word ending in English.

It's possible that you might be thinking of words with similar endings like:

* -tion: (e.g., discussion, decision, invention)

* -sion: (e.g., vision, tension, invasion)

* -ition: (e.g., condition, position, repetition)

If you can provide more context about where you encountered this ending, I might be able to give a more helpful answer!