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The following vocabulary list is adapted from The Century Vocabulary Builder.
Habitation, abode, dwelling, residence, domicile, home.
Harmful, injurious, detrimental, pernicious, deleterious, baneful, noxious.
Have, possess, own, hold.
Headstrong, wayward, wilful, perverse, froward.
Help (noun), aid, assistance, succor.
Help (verb), assist, aid, succor, abet, second, support, befriend.
Hesitate, falter, vacillate, waver.
Hide, conceal, secrete.
High, tall, lofty, elevated, towering.
Hint, intimate, insinuate.
Hopeful, expectant, sanguine, optimistic, confident.
Hopeless, despairing, disconsolate, desperate.
Holy, sacred, hallowed, sanctified, consecrated, godly, pious, saintly, blessed.
Impolite, discourteous, inurbane, uncivil, rude, disrespectful, pert, saucy, impertinent, impudent, insolent.
Importance, consequence, moment.
Impostor, pretender, charlatan, masquerader, mountebank, deceiver, humbug, cheat, quack, shyster, empiric.
Imprison, incarcerate, immure.
Improper, indecent, indecorous, unseemly, unbecoming, indelicate.
Impure, tainted, contaminated, polluted, defiled, vitiated.
Inborn, innate, inbred, congenital.
Incite, instigate, stimulate, impel, arouse, goad, spur, promote.
Inclose, surround, encircle, circumscribe, encompass.
Increase, grow, enlarge, magnify, amplify, swell, augment.
Indecent, indelicate, immodest, shameless, ribald, lewd, lustful, lascivious, libidinous, obscene.
Insane, demented, deranged, crazy, mad.
Insanity, dementia, derangement, craziness, madness, lunacy, mania, frenzy, hallucination.
Insipid, tasteless, flat, vapid.
Intention, intent, purpose, plan, design, aim, object, end.
Interpose, intervene, intercede, interfere, mediate.
Irreligious, ungodly, impious, godless, sacrilegious, blasphemous, profane.
Irritate, exasperate, nettle, incense.
*Denise and I recommend only software that we have tried and tested ourselves. These include Ultimate Vocabulary. We have agreed to receive a commission from some sales of the Ultimate Vocabulary software because we are happy to endorse this award-winning vocabulary-building software.