The Collaborative International Dictionary of English v.0.48:

Tyro \Ty"ro\, n.; pl. Tyros. [L. tiro a newlylevied soldier, a
   beginner.]
   A beginner in learning; one who is in the rudiments of any
   branch of study; a person imperfectly acquainted with a
   subject; a novice. [Written also tiro.]
   [1913 Webster]

         The management of tyros of eighteen
         Is difficult.                            --Cowper.
   [1913 Webster]

U.S. Gazetteer (1990):

Tyro, KS (city, FIPS 71925)
  Location: 37.03670 N, 95.82142 W
  Population (1990): 243 (98 housing units)
  Area: 1.4 sq km (land), 0.0 sq km (water)

Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "tyro":
   abecedarian, alphabetarian, apprentice, articled clerk, baby,
   beginner, boot, catechumen, colt, dabbler, deb, debutant,
   dilettante, entrant, fledgling, freshman, greenhorn, greeny,
   ignoramus, inductee, infant, initiate, learner, neophyte, nestling,
   new boy, newcomer, nonprofessional, novice, novitiate, postulant,
   probationer, probationist, raw recruit, recruit, rookie, smatterer,
   tenderfoot, trainee