Accept means "to receive."
Except is usually a preposition meaning "but" or "leaving out." However, except can also be a verb meaning "to leave out."
As verbs, accept and except are nearly antonyms, so the difference is important!
Examples: He accepted the gift. (He received it.) He excepted the twins. (He did not include them.)
Everyone except Bill. (All but Bill.)
Just remember: the “X” in “except” excludes things—they tend to stand out, be different. In contrast, just look at those two cozy “C’s” snuggling up together. Very accepting.
Source: here and here