For one thing, adviser is definitely the older of The 2 terms. It’s an example of a noun derived from a verb (a nominalization). In such a case, the verb was advise. Advise, when applied by using a direct object, implies to present counsel, to advise, or to provide information. https://smallbusinessconsultant94692.bloguetechno.com/5-easy-facts-about-ecommerce-consultant-described-68182712