Councilor
Part of speech: noun
Definition: Member of a council, especially a city council, as a gender-free term replacing councilman and councilwoman.
Counselor
Part of speech: noun
Definition: A professional who counsels people, especially on personal problems.a licensed and professionally trained counselora school counselor, often in a specialty such as careers, education, or healtha counselor, counsellor, counselor-at-law or counsellor-at-law is an attorney, a high ranking diplomat, usually just below an ambassador or ministera children's supervisor, usually at camp