You searched for: “oratoriums”
oratorium (s) (noun), oratoriums (pl)
A small chapel, especially for private worship: Sally was glad to have found an oratorium because she needed some peace for thinking and praying for the return of her missing daughter.
This entry is located in the following units: ora-, or-, orat-; os- + (page 3) -orium, -oria, -ory (page 3)