The Collaborative International Dictionary of English v.0.48:
Tor \Tor\, n. [AS. torr; cf. Gael. torr. Cf. Tower.]
1. A tower; a turret. [R.] --Ray.
2. High-pointed hill; a rocky pinnacle. [Prov. Eng.]
A rolling range of dreary moors, unbroken by tor or
tree. --C. Kingsley.
[1913 Webster] Torace
WordNet (r) 3.0 (2006):
n 1: a prominent rock or pile of rocks on a hill
2: a high rocky hill
Moby Thesaurus II by Grady Ward, 1.0:
23 Moby Thesaurus words for "tor":
Everest, Olympus, alp, crest, hilltop, hump, knoll,
lofty mountains, lofty peak, mount, mountain, mountaintop, peak,
pic, pico, pike, pinnacle, point, precipice, spur, summit,
the wooded mountains, towering alps