- roundCircular or cylindrical; having a circular cross-section in one direction.
- rotundHaving a round, spherical or curved shape; circular; orbicular.
- rondelA metric form of verse using two rhymes, usually fourteen 8- to 10-syllable lines in three stanzas, with the first lines of the first stanza returning as refrain of the next two.
- tondoA round picture or other work of art.
- rotundifoliousHaving round leaves.