nonmalignant tumour vs nonmalignant neoplasm

nonmalignant tumour and nonmalignant neoplasm both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonmalignant tumour	Yes	No	No	No
nonmalignant neoplasm	Yes	No	No	No

As nouns, nonmalignant tumour and nonmalignant neoplasm are synonyms defined as:

nonmalignant tumour and nonmalignant neoplasm: a tumor that is not cancerous

Other synonyms of nonmalignant tumour include benign tumor, benign tumour, nonmalignant tumor.

nonmalignant tumour (noun)	nonmalignant neoplasm (noun)
a tumor that is not cancerous	a tumor that is not cancerous