I have never heard of an "action verb" but I do know that a verb is an action.
It doesn't really describe anything, it is something the character does.
EXAMPLE:
Run, talk, skip, shop, cry, laugh, smile, etc.....
An adverb can describe a verb, if that's what you meant.
EXAMPLE:
He ran _quickly_
Most adverbs end in -ly-
"Mute" is another verb that can be used to describe silence.
You cannot describe compete because it is a verb and you have to describe a word with a verb.
A descriptive verb is a verb that describes some thing.
Adverbs add information to the verb. Adjectives describe nouns.
There is no verb form, definitely is an adverb used to describe a verb.
I describe. She describes.
describe
The noun forms for the verb to describe are describer, description, and the gerund, describing.
An adverb can modify or describe a verb.
A strong verb is a word to describe another word
A physical verb is a verb that is used to describe the action of a sentence
"Shopping" is a verb, specifically, it is the present participle of the verb "to shop".