osteosarcoma vs sarcoma

osteosarcoma and sarcoma both are nouns.

Word	Noun	Adjective	Verb	Adverb
osteosarcoma	Yes	No	No	No
sarcoma	Yes	No	No	No

As nouns, sarcoma is a hypernym of osteosarcoma; that is, sarcoma is a word with a broader meaning than osteosarcoma:

osteosarcoma: malignant bone tumor; most common in children and young adults where it tends to affect the femur
sarcoma: a usually malignant tumor arising from connective tissue (bone or muscle etc.); one of the four major types of cancer

osteosarcoma (noun)	sarcoma (noun)
malignant bone tumor; most common in children and young adults where it tends to affect the femur	a usually malignant tumor arising from connective tissue (bone or muscle etc.); one of the four major types of cancer