lighthouse vs pharos

lighthouse and pharos both are nouns.

Word	Noun	Adjective	Verb	Adverb
lighthouse	Yes	No	No	No
pharos	Yes	No	No	No

As nouns, lighthouse and pharos are synonyms defined as:

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

Other synonyms of lighthouse include beacon, beacon light.

lighthouse (noun)	pharos (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