| Word | Definitions | Synonyms |
|---|---|---|
| rhombic | (adjective) resembling a rhombus | - |
| rhombohedral | (adjective) having threefold symmetry | Synonyms: trigonal |
| rhomboid | (adjective) shaped like a rhombus or rhomboid | Synonyms: rhomboidal |
| rhomboidal | (adjective) shaped like a rhombus or rhomboid | Synonyms: rhomboid |