seaweed vs wrack

seaweed and wrack both are nouns.

Word	Noun	Adjective	Verb	Adverb
seaweed	Yes	No	No	No
wrack	Yes	No	Yes	No

As nouns, wrack is a hyponym of seaweed; that is, wrack is a word with a more specific, narrower meaning than seaweed:

Other hyponyms of seaweed include arame, seagrass, sea wrack, sea tang, tang.

seaweed (noun)	wrack (noun)
plant growing in the sea, especially marine algae	dried seaweed especially that cast ashore
	growth of marine vegetation especially of the large forms such as rockweeds and kelp
	the destruction or collapse of something

seaweed (verb)	wrack (verb)
	smash or break forcefully