coin blank vs disc

coin blank and disc both are nouns.

Word	Noun	Adjective	Verb	Adverb
coin blank	Yes	No	No	No
disc	Yes	No	No	No

As nouns, disc is a hypernym of coin blank; that is, disc is a word with a broader meaning than coin blank:

Other hypernyms of coin blank include disk.

coin blank (noun)	disc (noun)
a flat metal disk ready for stamping as a coin	a flat circular plate
	sound recording consisting of a disk with a continuous groove; used to reproduce music by rotating while a phonograph needle tracks in the groove
	(computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored
	something with a round shape resembling a flat circular plate