The Collaborative International Dictionary of English v.0.48:

Overawe \O`ver*awe"\, v. t. [imp. & p. p. Overawed; p. pr. &
   vb. n. Overawing.]
   To awe exceedingly; to intimidate or subjugate or restrain by
   awe or great fear.
   [1913 Webster]

         The king was present in person to overlook the
         magistrates, and overawe these subjects with the terror
         of his sword.                            --Spenser.
   [1913 Webster]

WordNet (r) 3.0 (2006):

overawe
    v 1: subdue, restrain, or overcome by affecting with a feeling
         of awe; frighten (as with threats) [syn: overawe, cow]

Moby Thesaurus II by Grady Ward, 1.0:

60 Moby Thesaurus words for "overawe":
   abash, awe, beat down, break, browbeat, bulldoze, bully, castrate,
   clamp down on, coerce, compel, cow, daunt, despotize, deter,
   discomfit, disconcert, discourage, dishearten, dominate, domineer,
   domineer over, enslave, faze, frighten, grind, grind down, hector,
   henpeck, intimidate, keep down, keep under, lord it over, oppress,
   overbear, overmaster, override, overwhelm, press heavy on, repress,
   ride over, ride roughshod over, scare, shake, stop, subjugate,
   suppress, terrify, terrorize, trample down, trample upon,
   tread down, tread upon, tyrannize, tyrannize over, unman, upset,
   walk all over, walk over, weigh heavy on