In conversation today I wanted to find a set of words that have an "or" sound in their middles, as in "torrent" and "sorcerer".

I couldn't find one. Most rhyming dictionaries I found only concerned themselves with the last syllable.

I think that part of the problem is that I'm not aware of the correct term for what I'm looking for. "Rhyme" almost always means the final syllable, not anything in the middle of the word. Thus, I'm hoping English.SE can help.

Is there a term for words which share a common middle syllable? Do you know of any sources that contain sets of such words?