kelpwort vs saltwort

kelpwort and saltwort both are nouns.

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

As nouns, kelpwort and saltwort are synonyms defined as:

kelpwort and saltwort: bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash

Other synonyms of kelpwort include barilla, glasswort, kali, Salsola kali, Salsola soda.

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