ornament vs modify

ornament is a noun but modify is not a noun.

Word	Noun	Adjective	Verb	Adverb
ornament	Yes	No	Yes	No
modify	No	No	Yes	No

As verbs, modify is a hypernym of ornament; that is, modify is a word with a broader meaning than ornament:

Other hypernyms of ornament include alter, change.

ornament (noun)	modify (noun)
something used to beautify

ornament (verb)	modify (verb)
make more attractive by adding ornament, colour, etc.	make less severe or harsh or extreme
be an ornament to	add a modifier to a constituent
	cause to change; make different; cause a transformation