oct- root words — words with the oct- root

The root oct- comes from Greek okto, meaning eight. 11 words in Dendril are built from it, including octagon, octagonal, octagons, octal, octave, octaves, octopus, octopuses, octane, octet, octogenarian. Dendril shows them on a free interactive word map — no signup, no ads.

Words that use the oct- root

Explore words with oct- — words containing the oct- root and sharing its sense of "eight". Examples include octagon, octagonal, octagons, octal, octave, octaves, octopus, octopuses, octane, octet, octogenarian. Click any word to see its own roots, definition, and related words.

The oct- root means eight, from Greek okto. Recognizing it helps you decode and remember the many English words built on this root.