tinsel vs decoration

tinsel and decoration both are nouns.

Word	Noun	Adjective	Verb	Adverb
tinsel	Yes	No	Yes	No
decoration	Yes	No	No	No

As nouns, decoration is a hypernym of tinsel; that is, decoration is a word with a broader meaning than tinsel:

Other hypernyms of tinsel include ornament, ornamentation.

tinsel (noun)	decoration (noun)
a thread with glittering metal foil attached	the act of decorating something (in the hope of making it more attractive)
a showy decoration that is basically valueless	something used to beautify
	an award for winning a championship or commemorating some other event