prefer vs opt

prefer and opt both are verbs.

Word	Noun	Adjective	Verb	Adverb
prefer	No	No	Yes	No
opt	No	No	Yes	No

As verbs, prefer and opt are synonyms defined as:

Other synonyms of prefer include choose.

prefer (verb)	opt (verb)
select as an alternative over another	select as an alternative over another
like better; value more highly
promote over another
give preference to one creditor over another