As nouns the difference between counsellor and councilor
is that counsellor is an alternative spelling of lang=en while councilor is member of a council, especially a city council, as a gender-free term replacing councilman and councilwoman.
councilor
English
Alternative forms
* councillor (British)
Noun
(
en noun)
(US) Member of a council, especially a city council, as a gender-free term replacing councilman and councilwoman.