traveller's tree vs woody plant

traveller's tree and woody plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
traveller's tree	Yes	No	No	No
woody plant	Yes	No	No	No

As nouns, woody plant is a hypernym of traveller's tree; that is, woody plant is a word with a broader meaning than traveller's tree:

traveller's tree: giant treelike plant having edible nuts and leafstalks that yield a refreshing drink of clear watery sap; reputedly an emergency source of water for travelers
woody plant: a plant having hard lignified tissues or woody parts especially stems

Other hypernyms of traveller's tree include ligneous plant.

traveller's tree (noun)	woody plant (noun)
giant treelike plant having edible nuts and leafstalks that yield a refreshing drink of clear watery sap; reputedly an emergency source of water for travelers	a plant having hard lignified tissues or woody parts especially stems