spiff up vs beautify

spiff up and beautify both are verbs.

Word	Noun	Adjective	Verb	Adverb
spiff up	No	No	Yes	No
beautify	No	No	Yes	No

As verbs, beautify is a hypernym of spiff up; that is, beautify is a word with a broader meaning than spiff up:

Other hypernyms of spiff up include embellish, fancify, prettify.

spiff up (verb)	beautify (verb)
make neat, smart, or trim	make more beautiful
	make more attractive by adding ornament, colour, etc.
	be beautiful to look at