Bohai Sea vs Po Hai

Bohai Sea and Po Hai both are nouns.

Word	Noun	Adjective	Verb	Adverb
Bohai Sea	Yes	No	No	No
Po Hai	Yes	No	No	No

As nouns, Bohai Sea and Po Hai are synonyms defined as:

Bohai Sea and Po Hai: an inlet of the Yellow Sea, on the coast of Eastern China

Other synonyms of Bohai Sea include Bo Hai.

Bohai Sea (noun)	Po Hai (noun)
an inlet of the Yellow Sea, on the coast of Eastern China	an inlet of the Yellow Sea, on the coast of Eastern China