adviser
noun /ədˈvaɪzə(r)/
  /ədˈvaɪzər/
 (also advisor)
 - a person who gives advice, especially somebody who knows a lot about a particular subject
- a financial adviser
 - adviser (to somebody) (on something) a special adviser to the President on education
 
Extra ExamplesTopics Suggestions and adviceb1, Jobsb1, Moneyb1- Students can sit down with a careers adviser and discuss what to do next.
 - The duke was the king's most trusted adviser.
 - You ought to consult an independent legal adviser.
 - an adviser on environmental issues
 - the government's chief economic adviser
 - top foreign policy advisers
 - He was Chief Scientific Adviser to the government.
 
Oxford Collocations Dictionaryadjective- chief
 - principal
 - senior
 - …
 
- act as
 - appoint
 - appoint somebody (as)
 - …
 
- adviser on
 - adviser to