osteochondroma vs benign tumor

osteochondroma and benign tumor both are nouns.

Word	Noun	Adjective	Verb	Adverb
osteochondroma	Yes	No	No	No
benign tumor	Yes	No	No	No

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

osteochondroma: benign tumor containing both bone and cartilage; usually occurs near the end of a long bone
benign tumor: a tumor that is not cancerous

Other hypernyms of osteochondroma include benign tumour, nonmalignant neoplasm, nonmalignant tumor, nonmalignant tumour.

osteochondroma (noun)	benign tumor (noun)
benign tumor containing both bone and cartilage; usually occurs near the end of a long bone	a tumor that is not cancerous