/ Thesaurus / S Synonyms of slagheap Find synonyms for: Noun1. slagheap, pile, heap, mound, agglomerate, cumulation, cumulususage: pile of waste matter from coal mining etcWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language