/ Thesaurus / B Synonyms of blastocytoma Find synonyms for: Noun1. blastoma, blastocytoma, embryonal carcinosarcoma, tumor, tumour, neoplasmusage: a tumor composed of immature undifferentiated cellsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language