/ Thesaurus / M Synonyms of malignant neoplastic disease Find synonyms for: Noun1. cancer, malignant neoplastic disease, malignant tumor, malignant neoplasm, metastatic tumorusage: any malignant growth or tumor caused by abnormal and uncontrolled cell division; it may spread to other parts of the body through the lymphatic system or the blood streamWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language