Synonyms for Guaiacum (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, lignum vitaeWordNet sense 2 (small genus of evergreen resinous trees or shrubs of warm and tropical America):
genus GuaiacumFrom the ODE community, based on WordNetadd/edit