Breadcrumb Home > Thesaurus Cite Synonyms of interminable Find synonyms for: Adjective1. endless, eternal, interminable, long (vs. short)usage: tiresomely long; seemingly without end; "endless debates"; "an endless conversation"; "the wait seemed eternal"; "eternal quarreling"; "an interminable sermon"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.See also: interminable (Dictionary) Related Content Daily Word Quiz: recherch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language Synonyms Index