Runs is a verb (3rd person singular), and fast is an adverb.
The word fast can be a noun meaning abstinence from food.
It is also a verb with the same meaning, to refrain from eating (as for religious or for medical purposes).
It is often an adjective meaning quick or rapid, or tightly attached (fastened).
It is also an adverb meaning quickly and rapidly, or tightly as above.
Adverb
The word faster is an adjective. It means more fast.
what part of speech is work
adverb
extremely is an adverb and usually describes (or modifies) an adjective. eg He ran extremely fast
i want to know what part of speech is camping
grammer
adverb
Fasted is a verb
Eaters is a noun.
The word faster is an adjective. It means more fast.
Olympic is a noun.
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
adverb
what part of speech is work
The word "blazing" can be an adjective (e.g. a blazing fire) or a verb (e.g. the sun was blazing).