The Collaborative International Dictionary of English v.0.48:

henpeck \hen"peck`\, hen-peck \hen"-peck`\(h[e^]n"p[e^]k`), v.
   t. [imp. & p. p. Henpecked (h[e^]n"p[e^]kt`); p. pr. & vb.
   n. Henpecking.]
   To bother persistently with trivial complaints; to subject to
   petty authority; -- said of a woman who thus treats her male
   companion, especially of wives who thus dominate their
   husbands. Commonly used in the past participle (often
   adjectively); as, henpecked for years, he finally left her.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

hen-peck
    v 1: bother persistently with trivial complaints; "She nags her
         husband all day long" [syn: nag, peck, hen-peck]

Moby Thesaurus II by Grady Ward, 1.0:

62 Moby Thesaurus words for "henpeck":
   beat down, break, browbeat, bug, bulldoze, bully, carp, carp at,
   castrate, cavil, clamp down on, coerce, compel, cow, daunt,
   despotize, domineer, domineer over, enslave, fret at, fuss,
   fuss at, grind, grind down, harass, hassle, hector, intimidate,
   keep down, keep under, lord it over, nag, nibble at, niggle,
   oppress, overawe, overbear, overmaster, override, peck at, pester,
   pick at, pick on, press heavy on, repress, ride over,
   ride roughshod over, subjugate, suppress, terrorize, torment,
   trample down, trample upon, tread down, tread upon, tyrannize,
   tyrannize over, unman, walk all over, walk over, weigh heavy on,
   yap at