shittimwood vs buckthorn

shittimwood and buckthorn both are nouns.

Word	Noun	Adjective	Verb	Adverb
shittimwood	Yes	No	No	No
buckthorn	Yes	No	No	No

As nouns, buckthorn is a hypernym of shittimwood; that is, buckthorn is a word with a broader meaning than shittimwood:

As nouns, buckthorn is a hypernym of shittimwood; that is, buckthorn is a word with a broader meaning than shittimwood:

shittimwood: shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit
buckthorn: any shrub or small tree of the genus Bumelia

shittimwood (noun)	buckthorn (noun)
wood of the shittah tree used to make the ark of the Hebrew Tabernacle	any shrub or small tree of the genus Bumelia
deciduous tree of southeastern United States and Mexico	a shrub or shrubby tree of the genus Rhamnus; fruits are source of yellow dyes or pigments
shrubby thorny deciduous tree of southeastern United States with white flowers and small black drupaceous fruit	an Old World plantain with long narrow ribbed leaves widely established in temperate regions