WordNet sense 1 (reddish-brown dried gummy exudation from any of several trees of the genus Eucalyptus especially Eucalyptus camaldulensis):

eucalyptus gum, eucalyptus kino

WordNet sense 2 (very large red gum tree):

marri, Eucalyptus calophylla

WordNet sense 3 (red gum tree of Tasmania):

peppermint, Eucalyptus amygdalina, peppermint gum

WordNet sense 4 (reddish-brown wood and lumber from heartwood of the sweet gum tree used to make furniture):

hazelwood, sweet gum, satin walnut

WordNet sense 5 (a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap):

bilsted, American sweet gum, Liquidambar styraciflua, sweet gum tree