festoon vs decorate

festoon is a noun but decorate is not a noun.

Word	Noun	Adjective	Verb	Adverb
festoon	Yes	No	Yes	No
decorate	No	No	Yes	No

As verbs, decorate is a hypernym of festoon; that is, decorate is a word with a broader meaning than festoon:

Other hypernyms of festoon include adorn, beautify, embellish, grace, ornament.

festoon (noun)	decorate (noun)
flower chains suspended in curves between points as a decoration
an embellishment consisting of a decorative representation of a string of flowers suspended between two points; used on pottery or in architectural work
a curtain of fabric draped and bound at intervals to form graceful curves

festoon (verb)	decorate (verb)
decorate with strings of flowers	provide with decoration
	make more attractive by adding ornament, colour, etc.
	award a mark of honor, such as a medal, to
	be beautiful to look at