| act | action, acting, acted, inaction |
| add | addition, additional |
| apply | application, applicant |
| beauty | beautiful, beautician, beautifully |
| care | careful, careless, caring, cared, cares, carefully |
| complete | completely, completed, completing, completion, incompletely |
| confuse | confusing, confused |
| cook | cooker, cooking, cooked, cooks |
| correct | correctly, incorrect, incorrectly, corrected |
| dark | darker, darkest |
| decide | decided, deciding, decisive, indecisive, decision, indecision |
| diet | dieter, dieting, dietician |
| electric | electricity, electrician |
| employ | employment, unemployment, employer, employee, employing |
| engine | engineer, engineering, engineered |
| enjoy | enjoyment, enjoyable, enjoyed |
| excite | excitement, excitable, excited, exciting, unexciting |
| faith | faithful, faithfully, unfaithful, unfaithfully |
| freeze | freezer, freezing |
| friend | friendly, friendship, unfriendly, friendless |
| happy | happiness, unhappy, unhappiest, unhappiness, happier, unhappier |
| hope | hopeful, hopeless |
| love | lover, loving, loveable, loved, unloved, lovely, lovelier, loveliest |
| produce | producer, produced, production |
| sad | sadness, saddest, sadder, |
| suit | suitable, unsuitable, suited, unsuited |
| use | usable, useless, used, using, user, misuse |
