out-of-date vs obsolete

out-of-date and obsolete both are adjectives.

Word	Noun	Adjective	Verb	Adverb
out-of-date	No	Yes	No	No
obsolete	No	Yes	No	No

As adjectives, out-of-date and obsolete are synonyms defined as:

Other synonyms of out-of-date include outdated, superannuated.

out-of-date (adjective)	obsolete (adjective)
old; no longer valid or fashionable	no longer in use
	old; no longer valid or fashionable