lignum vitae vs guaiac

lignum vitae and guaiac both are nouns.

Word	Noun	Adjective	Verb	Adverb
lignum vitae	Yes	No	No	No
guaiac	Yes	No	No	No

As nouns, lignum vitae and guaiac are synonyms defined as:

lignum vitae and guaiac: hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum

Other synonyms of lignum vitae include guaiacum.

lignum vitae (noun)	guaiac (noun)
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	hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum
hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum