phonograph recording disk vs acetate disk

phonograph recording disk and acetate disk both are nouns.

Word	Noun	Adjective	Verb	Adverb
phonograph recording disk	Yes	No	No	No
acetate disk	Yes	No	No	No

As nouns, phonograph recording disk and acetate disk are synonyms defined as:

phonograph recording disk and acetate disk: a disk coated with cellulose acetate

phonograph recording disk (noun)	acetate disk (noun)
a disk coated with cellulose acetate	a disk coated with cellulose acetate