DVD vs videodisc

DVD and videodisc both are nouns.

Word	Noun	Adjective	Verb	Adverb
DVD	Yes	No	No	No
videodisc	Yes	No	No	No

As nouns, DVD and videodisc are synonyms defined as:

DVD and videodisc: a digital recording (as of a movie) on an optical disk that can be played on a computer or a television set

Other synonyms of DVD include videodisk.

DVD (noun)	videodisc (noun)
a digital recording (as of a movie) on an optical disk that can be played on a computer or a television set	a digital recording (as of a movie) on an optical disk that can be played on a computer or a television set