gulfweed vs sargassum

gulfweed and sargassum both are nouns.

Word	Noun	Adjective	Verb	Adverb
gulfweed	Yes	No	No	No
sargassum	Yes	No	No	No

As nouns, gulfweed and sargassum are synonyms defined as:

gulfweed and sargassum: brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea

Other synonyms of gulfweed include sargasso, Sargassum bacciferum.

gulfweed (noun)	sargassum (noun)
brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea	brown algae with rounded bladders forming dense floating masses in tropical Atlantic waters as in the Sargasso Sea