disk vs American spelling

disk and American spelling both are nouns.

Word	Noun	Adjective	Verb	Adverb
disk	Yes	No	Yes	No
American spelling	Yes	No	No	No

disk (noun)	American spelling (noun)
a flat circular plate	English orthography used in the United States (characterized by 'analyze', 'center', 'usable')
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

disk (verb)	American spelling (verb)
draw a harrow over (land)