The word 'smooth' is not a noun.
The word 'smooth' is a verb (smooth, smooths, smoothing, smoothed), and an adjective (smooth, smoother, smoothest).
The noun form of the verb to smooth is the gerund, smoothing.
The noun form of the adjective smooth is smoothness.
"Smooth" is usually an adjective, but can be an adverb when it means "smoothly, in a smooth fashion."
e.g. the motor runs smooth, the wood must be sanded smooth.
(Purists might contend that the motor runs smooth is incorrect, it should be smoothly, but this is probably one of those cases where we have to accept that the language is changing.)
It can also be a verb.
Yes, smooth is an adjective.
Adverb.Here is an adverb, not an adjective.
its an adverb an adjective is a descriptive word an adverb is a feeling
No, it is an adverb. It is the adverb form of the adjective perfect.
Deliberate is an adjective, the adverb is deliberately.
No, it is an adverb. It is the adverb form of the adjective contented.
The word 'smoothly' is the adverb form of the adjective smooth. The noun form for the adjective smooth is smoothness.
Only where it is used in place of the actual adverb form, which is smoothly.E.g. The car engine runs very smooth now.Otherwise it is a verb (to make smooth) or an adjective.
Dark can be an adjective or a noun. Darkly is an adverb.
Adverb.Here is an adverb, not an adjective.
its an adverb an adjective is a descriptive word an adverb is a feeling
An adverb describes a verb, an adjective or another adverb.
It can be an adjective OR an adverb. adjective -- You dog is a friendly dog adverb -- She always talks friendly to me
Shyly is an adverb. The adjective form is just shy.
Nervous is an adjective. The adverb form is nervously.
Yes, "especially" can function as both an adverb and an adjective. As an adverb, it modifies a verb, an adjective, another adverb, or a sentence. As an adjective, it describes a noun.
Comprehensible is an adjective. The adverb is comprehensibly.
'The' is neither an adjective nor an adverb. It is an article.