set decoration vs ornamentation

set decoration and ornamentation both are nouns.

Word	Noun	Adjective	Verb	Adverb
set decoration	Yes	No	No	No
ornamentation	Yes	No	No	No

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

set decoration: a decoration used as part of the set of a theatrical or movie production
ornamentation: something used to beautify

Other hypernyms of set decoration include decoration, ornament.

set decoration (noun)	ornamentation (noun)
a decoration used as part of the set of a theatrical or movie production	the act of adding extraneous decorations to something
	something used to beautify
	the state of being ornamented