The Collaborative International Dictionary of English v.0.48:

Insectivore \In*sec"ti*vore\, n.; pl. Insectivores (-v[=o]rz).
   [F.] (Zool.)
   One of the Insectivora.
   [1913 Webster]

WordNet (r) 3.0 (2006):

insectivore
    n 1: small insect-eating mainly nocturnal terrestrial or
         fossorial mammals
    2: any organism that feeds mainly on insects

Moby Thesaurus II by Grady Ward, 1.0:

26 Moby Thesaurus words for "insectivore":
   amphibian, aquatic, biped, canine, cannibal, carnivore,
   cosmopolite, feline, gnawer, herbivore, invertebrate, mammal,
   mammalian, marsupial, marsupialian, omnivore, primate, quadruped,
   reptile, rodent, ruminant, scavenger, ungulate, varmint, vermin,
   vertebrate