| Word | Definitions | Synonyms |
|---|---|---|
| cactus | (noun) any succulent plant of the family Cactaceae native chiefly to arid regions of the New World and usually having spines | - |
| echinocactus | (noun) any cactus of the genus Echinocactus; strongly ribbed and very spiny; southwestern United States to Brazil | Synonyms: barrel cactus |