clothe vs dress up

clothe and dress up both are verbs.

Word	Noun	Adjective	Verb	Adverb
clothe	No	No	Yes	No
dress up	No	No	Yes	No

As verbs, dress up is a hyponym of clothe; that is, dress up is a word with a more specific, narrower meaning than clothe:

clothe (verb)	dress up (verb)
provide with clothes or put clothes on	put on special clothes to appear particularly appealing and attractive
cover as if with clothing	dress in a costume
furnish with power or authority; of kings or emperors	dress in a certain manner
	make something appear superficially attractive
	put a caparison on