lighthouse vs beacon light

lighthouse and beacon light both are nouns.

Word	Noun	Adjective	Verb	Adverb
lighthouse	Yes	No	No	No
beacon light	Yes	No	No	No

As nouns, lighthouse and beacon light are synonyms defined as:

lighthouse and beacon light: a tower with a light that gives warning of shoals to passing ships

Other synonyms of lighthouse include beacon, pharos.

lighthouse (noun)	beacon light (noun)
a tower with a light that gives warning of shoals to passing ships	a tower with a light that gives warning of shoals to passing ships