When a noun is used as a verb, linguistically, this process is termed as morphological conversion:
Fish (n): This is a fish.
Fish (v): I'm fishing in the river.
Why shouldn't we call it syntactic conversion? The word itself didn't change only the grammatical role has been affected?
And if an adjective, for example, is converted into a verb by adding a derivational suffix, then it should be called morphological conversion. Am I right?