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| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | ineffectual, valueless |
| Synonyms: | absent, bad, barren, characterless, imaginary, ineffective, inefficacious, inoperative, invalid, negative, nonexistent, nothing, null and void, powerless, unavailing, unreal, unsanctioned, useless, vain, void, worthless |
| Antonyms: | effective, effectual, valid, valuable, worthwhile, worthy |
| Main Entry: | invalid |
| Part of Speech: | adjective |
| Definition: | worthless; unfounded |
| Synonyms: | bad, baseless, fallacious, false, ill-founded, illogical, inoperative, irrational, mad, not binding, not working, nugatory, null, null and void, reasonless, sophistic, unreasonable, unreasoned, unscientific, unsound, untrue, void, wrong |
| Antonyms: | sound, valid, worthwhile, worthy |
| Main Entry: | nonexistent |
| Part of Speech: | adjective |
| Definition: | fictional, not real |
| Synonyms: | absent, airy, baseless, blank, chimerical, dead, defunct, departed, dreamlike, dreamy, empty, ethereal, extinct, extinguished, fancied, few and far between, flimsy, gone, gossamery, groundless, hallucinatory, hypothetical, illusory, imaginary, imagined, immaterial, imponderable, insubstantial, legendary, lost, missing, mythical, negative, null, null and void, passed away, passed on, perished, shadowy, tenuous, ungrounded, unreal, unsubstantial, vacant, vague, vaporous, void, without foundation |
| Antonyms: | actual, existent, existing, real, true |
| Main Entry: | unimportant |
| Part of Speech: | adjective |
| Definition: | of no real worth, value |
| Synonyms: | beside the point, casual, frivolous, frothy, immaterial, inconsequential, inconsiderable, indifferent, insignificant, irrelevant, little, low-ranking, meaningless, minor, minute, negligible, nonessential, nothing*, nugatory, null, of no account, of no consequence, paltry, petty, picayune, second-rate, shoestring, slight, trifling, trivial, unnecessary, useless, worthless, zero*, zilch, zip |
| Antonyms: | big, important, relevant, serious, useful, worthwhile |
* = informal/non-formal usage
| Main Entry: | void |
| Part of Speech: | adjective |
| Definition: | nullified, meaningless |
| Synonyms: | avoided, bad, dead, forceless, fruitless, ineffective, ineffectual, inoperative, invalid, negated, not viable, nugatory, null, null and void, set aside, sterile, unconfirmed, unenforceable, unfruitful, unratified, unsanctioned, unsuccessful, useless, vain, voided, worthless |
| Notes: | void means empty; devoid means empty, but empty only after something has been taken away |
| Antonyms: | full, meaningful, valid |
| Main Entry: | ineffective |
| Part of Speech: | adjective |
| Definition: | useless |
| Synonyms: | abortive, anticlimactic, barren, bootless, defeasible, emasculate, feckless, feeble, forceless, fruitless, futile, idle, impotent, inadequate, incompetent, indecisive, ineffectual, inefficacious, inefficient, inept, inferior, innocuous, inoperative, lame, limited, neutralized, no go, no way, not effective, nugatory, null, paltry, powerless, slack-spined, spineless, unable, unavailable, unavailing, unfruitful, unproductive, unprofitable, unsuccessful, vain, void, withered, worthless |
| Notes: | ineffectual refers to a general or habitual lack of success in the carrying out of one's projects; ineffective refers to a specific or definite failure to perform a task or accomplish a purpose |
| Antonyms: | effective |
| Main Entry: | null and void |
| Part of Speech: | adjective |
| Definition: | invalid |
| Synonyms: | annulled, cancelled out, no longer law, null, nullified, of no effect, void |
| Main Entry: | inefficacious |
| Part of Speech: | adjective |
| Definition: | ineffectual |
| Synonyms: | abortive, anticlimactic, barren, bootless, defeasible, feckless, feeble, forceless, fruitless, futile, idle, impotent, inadequate, incompetent, indecisive, ineffective, inefficient, inept, inferior, innocuous, inoperative, invertebrate, lame, limited, neutralized, nugatory, null, null and void, paltry, powerless, spineless, unable, unavailing, unfruitful, unproductive, unprofitable, unsuccessful, useless, vain, void, withered, worthless |
Roget's 21st Century Thesaurus, Third Edition
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Copyright © 2013 by the Philip Lief Group.
Cite This Source
Copyright © 2013 Dictionary.com, LLC. All rights reserved.
