metastatic tumor vs malignant tumor

metastatic tumor and malignant tumor both are nouns.

Word	Noun	Adjective	Verb	Adverb
metastatic tumor	Yes	No	No	No
malignant tumor	Yes	No	No	No

As nouns, metastatic tumor and malignant tumor are synonyms defined as:

metastatic tumor and malignant tumor: a tumor that is malignant and tends to spread to other parts of the body

Other synonyms of metastatic tumor include malignant neoplasm.

metastatic tumor (noun)	malignant tumor (noun)
a tumor that is malignant and tends to spread to other parts of the body	a tumor that is malignant and tends to spread to other parts of the body