Accept vs Except

—>Accept is a verb (a word that relays an action) meaning ‘consent to receive,’ ‘believe,’ or ‘come to recognize.’
Examples: I accept your apology. He accepted the reward. Accepting the fact there was nothing they could have done allowed them to move forward. They accepted me into their group.

—>The noun (person, place, or thing) version of accept is acceptance. It refers to the act of ‘consenting to receive’ or ‘being received as suitable.’
Examples: His acceptance into the academy was a great accomplishment. You must wait for their acceptance before you can join.

—>Except is a preposition (a word expressing relation to a noun) meaning ‘not including’ or ‘other than;’ a verb (a word that relays an action) meaning ‘to exclude;’ or a conjunction (a word that connects two or more thoughts).
Example (preposition): The store is open every day except Sunday.
Example (verb): He excepted three people from the list.
Example (conjunction): They didn’t know anything, except that they weren’t supposed to be there.

—>The noun (person, place, or thing) version of except is exception. It refers to something which is not included or that does not follow a rule.
Examples: The only exception to mandated PE classes was Steve because he had a doctor’s excuse. I will make an exception this one time.

NOTE: I have seen people use the word ‘exceptance,’ but this is not an officially recognized term. User definition varies.