What made you want to look up corpus uteri? Please tell us where you read or heard it (including the quote, if possible).
Confession of judgment is a legal term that refers to a type of contract (or a clause with such a provision) in which a party agrees to let the other party enter a judgment against him or her.
Judgment vs. judgement. In American English, judgement is generally considered a misspelling of judgment for all uses of the word, notwithstanding individual preferences. In British popular usage, judgment was traditionally the preferred form, but judgement has gained ground over the last couple of centuries and is now nearly as common as judgment.