Synonyms of 'consultant'
An adviser is an expert whose job is to give advice to another person or to a group of people.
a careers adviser
Someone who is an authority on a particular subject knows a lot about it.
He's an authority on Russian affairs.
A specialist is a person who has a particular skill or knows a lot about a particular subject.
a specialist in diseases of the nervous system
Thesaurus for consultant from the Collins English Thesaurus
A consultant is an experienced doctor with a high position, who specializes in one area of medicine.