smoothen vs beautify

smoothen and beautify both are verbs.

Word	Noun	Adjective	Verb	Adverb
smoothen	No	No	Yes	No
beautify	No	No	Yes	No

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

Other hypernyms of smoothen include embellish, fancify, prettify.

smoothen (verb)	beautify (verb)
become smooth	make more beautiful
make smooth or smoother, as if by rubbing	make more attractive by adding ornament, colour, etc.
make (a surface) shine	be beautiful to look at