How to spell ROSSEUM correctly?

We think the word rosseum is a misspelling. It could be just an incorrect spelling of the words which are suggested below. Review the list and pick the word which you think is the most suitable.

• possum I saw a possum rummaging through the trash cans in my backyard last night.
• rostrum The speaker confidently approached the rostrum to address the audience.

Anonymouty

• anonymity
• anonymous