nonmalignant tumor vs nonmalignant neoplasm

nonmalignant tumor and nonmalignant neoplasm both are nouns.

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

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

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

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

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