Adviser versus Advisor

What is the Difference Between Advisor and Adviser?

When to Use Adviser

Although both forms appear throughout the English-speaking world, there is a clear preference among dictionaries, usage guides, and writers alike for adviser (with an “e”). This is the older of the two spellings, which is probably the reason for its dominance.

When to Use Advisor

There is a somewhat popular myth that circulates around that adviser is the preferred spelling in British English and advisor is the preferred spelling in American English.

Adviser as an Adjective

While adviser is the preferred noun-form spelling, the adjectival form of adviser is actually spelled advisory. Perhaps this is what leads to confusion between adviser vs. advisor. For example,