American spelling vs leukemia

American spelling and leukemia both are nouns.

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

American spelling (noun)	leukemia (noun)
English orthography used in the United States (characterized by 'analyze', 'center', 'usable')	malignant neoplasm of blood-forming tissues; characterized by abnormal proliferation of leukocytes; one of the four major types of cancer