glasswort vs kelpwort

glasswort and kelpwort both are nouns.

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

As nouns, glasswort and kelpwort are synonyms defined as:

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

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

glasswort (noun)	kelpwort (noun)
fleshy maritime plant having fleshy stems with rudimentary scalelike leaves and small spikes of minute flowers; formerly used in making glass	bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash
bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash