Synonyms for root

noun

1. An underground portion of a plant

   radix, rootlet, root hair, tuber, taproot, radicle, rhizome, rootstock; see also bulb.

   Types of roots include: conical, napiform, fusiform, fibrous, moniliform, nodulose, tuberous, adventitious, prop, aerial, tap; rhizome, radix, tuber, bulb, taproot.

2. The cause or basis

   source, reason, motive, heart; see origin 2, 3. See syn. study at origin.

take root