endothelial myeloma vs Ewing's sarcoma

endothelial myeloma and Ewing's sarcoma both are nouns.

Word	Noun	Adjective	Verb	Adverb
endothelial myeloma	Yes	No	No	No
Ewing's sarcoma	Yes	No	No	No

As nouns, endothelial myeloma and Ewing's sarcoma are synonyms defined as:

endothelial myeloma and Ewing's sarcoma: malignant tumor in bone marrow (usually in the pelvis or in long bones)

Other synonyms of endothelial myeloma include Ewing's tumor, Ewing's tumour.

endothelial myeloma (noun)	Ewing's sarcoma (noun)
malignant tumor in bone marrow (usually in the pelvis or in long bones)	malignant tumor in bone marrow (usually in the pelvis or in long bones)