interior decoration vs decor

interior decoration and decor both are nouns.

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

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

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

interior decoration (noun)	decor (noun)
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
decoration consisting of the layout and furnishings of a livable interior