medico vs Dr.

medico and Dr. both are nouns.

Word	Noun	Adjective	Verb	Adverb
medico	Yes	No	No	No
Dr.	Yes	No	No	No

As nouns, medico and Dr. are synonyms defined as:

Other synonyms of medico include doc, doctor, MD, physician.

medico (noun)	Dr. (noun)
a licensed medical practitioner	a licensed medical practitioner
a student in medical school	a person who holds Ph.D. degree (or the equivalent) from an academic institution