tang vs sea tangle

tang and sea tangle both are nouns.

Word	Noun	Adjective	Verb	Adverb
tang	Yes	No	No	No
sea tangle	Yes	No	No	No

As nouns, tang and sea tangle are synonyms defined as:

tang and sea tangle: any of various kelps especially of the genus Laminaria

tang (noun)	sea tangle (noun)
any of various kelps especially of the genus Laminaria	any of various kelps especially of the genus Laminaria
any of various coarse seaweeds
brown algae seaweed with serrated edges
a common rockweed used in preparing kelp and as manure
a tart spicy quality
the taste experience when a savoury condiment is taken into the mouth