Antonyms of adj untimbered

2 senses of untimbered

Sense 1
untimbered (vs. timbered) -- (lacking timbers; "an untimbered boat")

timbered (vs. untimbered) -- (furnished with or made of wood or timbers; "timbered walls")
        => half-timber, half-timbered -- (having exposed wood framing with spaces filled with masonry, as in Tudor architecture)
        => timber-framed -- (framed by exposed timbers; "a magnificently timbered old barn")

Sense 2
untimbered -- (without trees; "an untimbered area")

INDIRECT (VIA unwooded) -> wooded -- (covered with growing trees and bushes etc; "wooded land"; "a heavily wooded tract")

Similarity of adj untimbered

2 senses of untimbered

Sense 1
untimbered (vs. timbered) -- (lacking timbers; "an untimbered boat")

Sense 2
untimbered -- (without trees; "an untimbered area")
       => unwooded (vs. wooded), treeless -- (not wooded)