carcinoid vs tumor

carcinoid and tumor both are nouns.

Word	Noun	Adjective	Verb	Adverb
carcinoid	Yes	No	No	No
tumor	Yes	No	No	No

As nouns, tumor is a hypernym of carcinoid; that is, tumor is a word with a broader meaning than carcinoid:

carcinoid: a small tumor (benign or malignant) arising from the mucosa of the gastrointestinal tract; usually associated with excessive secretion of serotonin
tumor: an abnormal new mass of tissue that serves no purpose

Other hypernyms of carcinoid include neoplasm, tumour.

carcinoid (noun)	tumor (noun)
a small tumor (benign or malignant) arising from the mucosa of the gastrointestinal tract; usually associated with excessive secretion of serotonin	an abnormal new mass of tissue that serves no purpose