onco- root words — words with the onco- root

The root onco- comes from Greek onkos, meaning tumor. 1 words in Dendril are built from it, including oncology. Dendril shows them on a free interactive word map — no signup, no ads.

Words that use the onco- root

Explore words with onco- — words containing the onco- root and sharing its sense of "tumor". Examples include oncology. Click any word to see its own roots, definition, and related words.

What does onco- mean?

The onco- root means tumor, from Greek onkos. Recognizing it helps you decode and remember the many English words built on this root.