Synonyms:
adviser, advisor, consultant
Meaning: an expert who gives advice; "an adviser helped students select their courses"; "the United States sent military advisors to Guatemala"
Usage examples
From my own experience as a teacher and consultant, I state without hesitation that in no other branch of medicine or surgery are graver emergencies encountered than in certain obstetrical complications whose treatment involves the greatest responsibility and requires the highest order of ability to insure a successful outcome for the mother and her child.