The Collaborative International Dictionary of English v.0.48:

Bachelorhood \Bach"e*lor*hood\ (-h[oo^]d), n.
   The state or condition of being a bachelor; bachelorship.
   [1913 Webster]

WordNet (r) 3.0 (2006):

bachelorhood
    n 1: the time of a man's life prior to marriage
    2: the state of being an unmarried man

Moby Thesaurus II by Grady Ward, 1.0:

18 Moby Thesaurus words for "bachelorhood":
   bachelordom, bachelorism, bachelorship, celibacy, continence,
   maidenhead, maidenhood, misogamy, misogyny, monachism, monasticism,
   single blessedness, single state, singleness, spinsterhood,
   unwed state, virgin state, virginity