carcinoid vs neoplasm

carcinoid and neoplasm both are nouns.

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

As nouns, neoplasm is a hypernym of carcinoid; that is, neoplasm 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
neoplasm: an abnormal new mass of tissue that serves no purpose

Other hypernyms of carcinoid include tumor, tumour.

carcinoid (noun)	neoplasm (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