heart surgeon vs heart specialist

heart surgeon and heart specialist both are nouns.

Word	Noun	Adjective	Verb	Adverb
heart surgeon	Yes	No	No	No
heart specialist	Yes	No	No	No

As nouns, heart surgeon and heart specialist are synonyms defined as:

heart surgeon and heart specialist: a specialist in cardiology; a specialist in the structure and function and disorders of the heart

Other synonyms of heart surgeon include cardiologist.

heart surgeon (noun)	heart specialist (noun)
a specialist in cardiology; a specialist in the structure and function and disorders of the heart	a specialist in cardiology; a specialist in the structure and function and disorders of the heart