consultant
noun
[ kənˈsʌlt(ə)nt ]
• a person who provides expert advice professionally.
Similar:
adviser,
guide,
counsellor,
expert,
specialist,
authority,
pundit,
ace,
whizz,
wizard,
hotshot,
maven,
• a hospital doctor of senior rank within a specific field.
• "a consultant paediatrician"
Origin:
late 17th century (in the sense ‘a person who consults’): probably from French, from Latin consultare (see consult).