virile

from WordNet (r) 3.0 (2006)

virile
    adj 1: characterized by energy and vigor; "a virile and ever
           stronger free society"; "a new and virile leadership"
    2: characteristic of a man; "a deep male voice"; "manly sports"
       [syn: {male}, {manful}, {manlike}, {manly}, {virile}]
    3: (of a male) capable of copulation [syn: {potent}, {virile}]
       [ant: {impotent}]

from The Collaborative International Dictionary of English v.0.48

Virile \Vi"rile\ (?; 277), a. [L. virilis, fr. vir a man; akin
   to AS. wer: cf. F. viril. See {Werewolf}, {World}, and cf.
   {Decemvir}, {Virago}, {Virtue}.]
   Having the nature, properties, or qualities, of an adult man;
   characteristic of developed manhood; hence, masterful;
   forceful; specifically, capable of begetting; -- opposed to
   womanly, feminine, and puerile; as, virile age, virile power,
   virile organs.
   [1913 Webster]
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

18 Moby Thesaurus words for "virile":
      broad-shouldered, decisive, driving, energetic, forceful,
      hairychested, he-mannish, macho, male, manful, manlike, manly,
      mannish, masculine, potent, robust, ultramasculine, viripotent