Chapter In terrorem to Inventive of I by Soule's Synonymes

2. (Law.) Void, null, of no legal force, null and void.

3. Unsound, unfounded, baseless, untrue, fallacious, that does not hold (good).

Invalid (in’val-id), a. Weak, feeble, infirm, sick, sickly, weakly, frail, valetudinary.

Invalid (in’val-id), n Valetudinarian, feeble person, infirm person, sick person.

Invalidate, v. a. Nullify, annul, cancel, overthrow, make void, render of no effect.

Invalidism, n. Feebleness, infirmity, illness, sickness, valetudinarianism.

Invalidity, n. Unsoundness, lack of validity, nullity, baselessness, fallaciousness, fallacy, falsity.

Invaluable, a. Inestimable, priceless, very precious, above all value, above all price. See Inestimable.

Invariability, n. See Invariableness.

Invariable, a.

1. Unchangeable, immutable, unalterable, changeless.

2. Constant, unchanging, uniform, changeless, unvarying.

Invariableness, n.

1. Unchangeableness, immutability, invariability, changelessness.

2. Constancy, uniformity, changelessness, unvarying character.

Invasion, n.

1. Attack, assault, aggression, incursion, irruption, inroad, foray, raid.

2. Encroachment, infringement, violation.

3. Invading. See the verb.

Invective, n.

1. Abuse, contumely, reproach, censure, railing, vituperation, sarcastic attack, rhetorical assault.

2. Satire, sarcasm, pasquinade, philippic, diatribe, fling.