/ Thesaurus / P Synonyms of plasmacytoma Find synonyms for: Noun1. plasmacytoma, tumor, tumour, neoplasmusage: neoplasm of plasma cells (usually in bone marrow)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language