ophthalmologist vs eye doctor

ophthalmologist and eye doctor both are nouns.

Word	Noun	Adjective	Verb	Adverb
ophthalmologist	Yes	No	No	No
eye doctor	Yes	No	No	No

As nouns, ophthalmologist and eye doctor are synonyms defined as:

ophthalmologist and eye doctor: a medical doctor specializing in the diagnosis and treatment of diseases of the eye

Other synonyms of ophthalmologist include oculist.

ophthalmologist (noun)	eye doctor (noun)
a medical doctor specializing in the diagnosis and treatment of diseases of the eye	a medical doctor specializing in the diagnosis and treatment of diseases of the eye