The Collaborative International Dictionary of English v.0.48:

Virility \Vi*ril"i*ty\, n. [L. virilitas: cf. F. virilit['e].]
   The quality or state of being virile; developed manhood;
   manliness; specif., the power of procreation; as, exhaustion.
   "Virility of visage." --Holland.
   [1913 Webster]

WordNet (r) 3.0 (2006):

virility
    n 1: the masculine property of being capable of copulation and
         procreation
    2: the trait of being manly; having the characteristics of an
       adult male [syn: manfulness, manliness, virility]

Moby Thesaurus II by Grady Ward, 1.0:

96 Moby Thesaurus words for "virility":
   adulthood, adultness, age of consent, amperage, armipotence,
   authority, beef, black power, brute force, charge, charisma, clout,
   cogence, cogency, compulsion, dint, drive, driving age, duress,
   effect, effectiveness, effectuality, energy, flower of age,
   flower power, force, force majeure, forcefulness, full age,
   full blast, full bloom, full force, full growth, fullgrownness,
   grown-upness, influence, legal age, legalis homo, machismo,
   main force, main strength, majority, mana, manhood, manlihood,
   manly vigor, mature age, maturity, might, might and main,
   mightiness, moxie, muscle power, pizzazz, poop, potence, potency,
   potentiality, power, power pack, power structure, power struggle,
   powerfulness, prepotency, prime, prime of life, productiveness,
   productivity, puissance, pull, punch, push, ripe age, riper years,
   sexual power, sinew, steam, strength, strong arm, superiority,
   superpower, toga virilis, ultramasculinity, validity, vehemence,
   vigor, vim, virileness, virtue, virulence, vitality, wattage,
   weight, womanhood, womanlihood, years of discretion