Alloy:
Dictonary:A homogeneous mixture or solid solution of two or more metals, the atoms of one replacing or occupying interstitial positions between the atoms of the other: Brass is an alloy of copper and zinc.
Thesaurus: A mixture: Alloy, bronze, brass, billon, electrum, pewter, steel
Compound: Compound, alloy, amalgam, blend, composite, a mixture
Mineral: Alloy, a mixture