discus vs disc

discus and disc both are nouns.

Word	Noun	Adjective	Verb	Adverb
discus	Yes	No	No	No
disc	Yes	No	No	No

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

Other hypernyms of discus include disk, sports equipment.

discus (noun)	disc (noun)
a disk used in throwing competitions	a flat circular plate
an athletic competition in which a disk-shaped object is thrown as far as possible	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