rhabdomyosarcoma vs sarcoma

rhabdomyosarcoma and sarcoma both are nouns.

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

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

rhabdomyosarcoma: a highly malignant neoplasm derived from striated muscle
sarcoma: a usually malignant tumor arising from connective tissue (bone or muscle etc.); one of the four major types of cancer

rhabdomyosarcoma (noun)	sarcoma (noun)
a highly malignant neoplasm derived from striated muscle	a usually malignant tumor arising from connective tissue (bone or muscle etc.); one of the four major types of cancer