WordNet (r) 3.0 (2006):

Tellus
    n 1: (Roman mythology) goddess of the earth; protector of
         marriage and fertility; identified with Greek Gaea

Moby Thesaurus II by Grady Ward, 1.0:

85 Moby Thesaurus words for "Tellus":
   Agdistis, Amor, Aphrodite, Apollo, Apollon, Ares, Artemis, Ate,
   Athena, Bacchus, Ceres, Cora, Cronus, Cupid, Cybele, Demeter,
   Despoina, Diana, Dionysus, Dis, Earth, Eros, Gaea, Gaia, Ge,
   Great Mother, Hades, Helios, Hephaestus, Hera, Here, Hermes,
   Hestia, Hymen, Hyperion, Jove, Juno, Jupiter, Jupiter Fidius,
   Jupiter Fulgur, Jupiter Optimus Maximus, Jupiter Pluvius,
   Jupiter Tonans, Kore, Kronos, Magna Mater, Mars, Mercury, Minerva,
   Mithras, Momus, Neptune, Nike, Olympians, Olympic gods, Ops, Orcus,
   Persephassa, Persephone, Phoebus, Phoebus Apollo, Pluto, Poseidon,
   Proserpina, Proserpine, Rhea, Saturn, Terra, Venus, Vesta, Vulcan,
   Zeus, biosphere, geography, geosphere, globe, mother earth, terra,
   terrestrial globe, the blue planet, this pendent world, vale,
   vale of tears, whole wide world, world