saltwort vs shrub

saltwort and shrub both are nouns.

Word	Noun	Adjective	Verb	Adverb
saltwort	Yes	No	No	No
shrub	Yes	No	No	No

As nouns, shrub is a hypernym of saltwort; that is, shrub is a word with a broader meaning than saltwort:

saltwort: low-growing strong-smelling coastal shrub of warm parts of the New World having unisexual flowers in conelike spikes and thick succulent leaves
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of saltwort include bush.

As nouns, shrub is a hypernym of saltwort; that is, shrub is a word with a broader meaning than saltwort:

saltwort: bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash
shrub: a low woody perennial plant usually having several major stems

Other hypernyms of saltwort include bush.

saltwort (noun)	shrub (noun)
low-growing strong-smelling coastal shrub of warm parts of the New World having unisexual flowers in conelike spikes and thick succulent leaves	a low woody perennial plant usually having several major stems
bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash