| Term | Definition |
| homochromatic | having the same color, monochromatic, unicolor |
| heterochromatic | having different colors |
| homogeneous | of the same kind, similar, uniform |
| heterogeneous | different in kind, dissimilar, vaired |
| homology | similarity in structure |
| heterology | dissimilarity in structure |
| homomorphic | exhibiting similarity of form |
| heteromorphic | exhibiting diversity of form |
| homonym | word that sounds like another but differs in meaning and spelling |
| heteronym | word spelled like another but differing in sound and meaning |
| homocentric | having the same center; concentric |
| homophonic | having the same sound or voice |
| heteroclite (adj) | deviating from the common rule; abnormal |
| heteroclite (n.) | person or thing deviating from the common rule |
| heterodox | opposed to accepted beliefs or established doctrines, especially in religion, unorthodox |