decor vs interior decoration

decor and interior decoration both are nouns.

Word	Noun	Adjective	Verb	Adverb
decor	Yes	No	No	No
interior decoration	Yes	No	No	No

As nouns, decor and interior decoration are synonyms defined as:

decor and interior decoration: decoration consisting of the layout and furnishings of a livable interior

decor (noun)	interior decoration (noun)
decoration consisting of the layout and furnishings of a livable interior	the trade or act of decorating the interior of a building or room, especially with regard to color combination, paint, fabrics, carpeting, etc.
	decoration consisting of the layout and furnishings of a livable interior