Davies. JC Smith's The Law of Contract (2021 3 ed). p. 478 is part of the Glossary.
Obligee a party to whom an obligation is owed.
Obligor a party who owes an obligation.
Offeree a party receiving an offer.
Offeror a party making an offer.
Promisee a party to whom a promissory obligation is owed.
Promisor a party who owes a promissory obligation.
I've read many English law judgments, and I always see Offeree/Offeror and Promisee/Promisor. I rarely see Obligee/Obligor. But aren't these pairs superfluous? How can they be distinguished?
If you're a promisee, you must've have been an offerree because you must have accepted the offer that you received! Similarly, if you're a promisor, you must've been the offeror!
Above, Obligee/Obligor and Promisee/Promisor are identical except for "promissory" in the definition for Promisee/Promisor.