honour vs decoration

honour and decoration both are nouns.

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

As nouns, decoration is a hyponym of honour; that is, decoration is a word with a more specific, narrower meaning than honour:

honour: a tangible symbol signifying approval or distinction
decoration: an award for winning a championship or commemorating some other event

honour (noun)	decoration (noun)
the quality of being honorable and having a good name	the act of decorating something (in the hope of making it more attractive)
a woman's virtue or chastity	something used to beautify
a tangible symbol signifying approval or distinction	an award for winning a championship or commemorating some other event
the state of being honored