| 強化 | きょうか | strengthen, intensify, reinforce, solidify, enhancement |
| 文化 | ぶんか | culture, civilization, civilisation; Bunka era (1804.2.11-1818.4.22) |
| 変化 | へんか | change, variation, alteration, mutation, transition, transformation, transfiguration, metamorphosis; variety, diversity; inflection, declension, conjugation; sidestepping (sumo) |
| 悪化 | あっか | (suffer) deterioration, growing worse, aggravation, degeneration, corruption |
| 化学 | かがく, ばけがく | chemistry; chemical company (e.g. Acme Chemical Co.) |
| 酸化 | さんか | oxidation |
| 化粧 | けしょう, けわい, けそう | make-up, cosmetics |
| 合理化 | ごうりか | rationalization, rationalisation, rationalize, rationalise |
| 国際化 | こくさいか | internationalization, internationalisation, i18n (in IT) |
| 本格化 | ほんかくか | regularization, regularisation, getting up speed, proceeding at full tilt |
