cop out vs opt out

cop out and opt out both are verbs.

Word	Noun	Adjective	Verb	Adverb
cop out	No	No	Yes	No
opt out	No	No	Yes	No

As verbs, cop out and opt out are synonyms defined as:

cop out and opt out: choose not to do something, as out of fear of failing

cop out (verb)	opt out (verb)
choose not to do something, as out of fear of failing	choose not to do something, as out of fear of failing