Synonyms for Lignum Vitae (same or very similar meaning)
WordNet sense 1 (hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum):
guaiac, GuaiacumWordNet sense 2 (small evergreen tree of Caribbean and southern Central America to northern South America; a source of lignum vitae wood, hardest of commercial timbers, and a medicinal resin):
Guaiacum officinaleFrom the ODE community, based on WordNetadd/edit