sand tumor vs tumour

sand tumor and tumour both are nouns.

Word	Noun	Adjective	Verb	Adverb
sand tumor	Yes	No	No	No
tumour	Yes	No	No	No

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

sand tumor: a tumor derived from fibrous tissue of the meninges or choroid plexus or certain other structures associated with the brain; characterized by sandlike particles
tumour: an abnormal new mass of tissue that serves no purpose

Other hypernyms of sand tumor include neoplasm, tumor.

sand tumor (noun)	tumour (noun)
a tumor derived from fibrous tissue of the meninges or choroid plexus or certain other structures associated with the brain; characterized by sandlike particles	an abnormal new mass of tissue that serves no purpose