| Term | Definition |
| Homochromatic | having the same color |
| Heterochromatic | having different colors |
| Homogeneous | of the same kind |
| Heterogenous | different in kind |
| Homology | similarity in structure |
| Heterology | dissimilarity in structure |
| Homomorphic | exhibiting similarity of form |
| Heteromorphic | exhibiting diversity in form |
| Homonym | word that sounds like another but differs in meaning |
| Heteronym | word spelled like another but differs in sound |
| Homosentric | having the same center |
| Homophonic | having the same sound |
| Heteroclite | abnormal |
| Heterodox | unorthodox |