investment adviser vs investment advisor

investment adviser and investment advisor both are nouns.

Word	Noun	Adjective	Verb	Adverb
investment adviser	Yes	No	No	No
investment advisor	Yes	No	No	No

As nouns, investment adviser and investment advisor are synonyms defined as:

investment adviser and investment advisor: someone who advises others how to invest their money

investment adviser (noun)	investment advisor (noun)
someone who advises others how to invest their money	someone who advises others how to invest their money