The Collaborative International Dictionary of English v.0.48:

Armada \Ar*ma"da\ ([aum]r*m[=a]"d[.a] or [aum]r*m[aum]"d[.a]),
   n. [Sp. armada, L. as if armata (sc. classic fleet), fr.
   armatus, p. p. of armare. See Arm, v. t. Army.]
   A fleet of armed ships; a squadron. Specifically, the Spanish
   fleet which was sent to assail England, a. d. 1558.
   [1913 Webster]

WordNet (r) 3.0 (2006):

armada
    n 1: a large fleet

Moby Thesaurus II by Grady Ward, 1.0:

24 Moby Thesaurus words for "armada":
   Naval Construction Battalion, RN, Royal Navy, Seabees, USN,
   United States Navy, argosy, coast guard, division, escadrille,
   fleet, flotilla, marine, merchant fleet, merchant marine,
   merchant navy, mosquito fleet, naval forces, naval militia,
   naval reserve, navy, squadron, task force, task group



U.S. Gazetteer Places (2000):

Armada, MI -- U.S. village in Michigan
   Population (2000):    1573
   Housing Units (2000): 558
   Land area (2000):     0.707976 sq. miles (1.833650 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.707976 sq. miles (1.833650 sq. km)
   FIPS code:            03520
   Located within:       Michigan (MI), FIPS 26
   Location:             42.843535 N, 82.881846 W
   ZIP Codes (1990):     48005
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Armada, MI
    Armada