Sharp is a noun, not a verb, and a replacement might be, "Keen"
A verb is a action, sharp is a adjective
Sharp, sharper, and sharpest are the comparative and superlative degrees of the word sharp.
"Sharp" can function as both an adjective and a verb. As an adjective, it describes a noun (e.g., sharp knife). As a verb, it can mean to make something sharper or more intense (e.g., sharpen a pencil).
"Snap" can be both a noun and a verb. As a noun, it refers to a sudden, sharp cracking sound. As a verb, it means to make a sudden, sharp cracking sound or to break or cause something to break with a sharp sound.
"Shouted" is a verb. It is the past tense of the verb "shout", which means to speak loudly in a sharp tone.
Replace is a verb.
You have hunger pangs. That means you have sudden sharp pains in your stomach. A pain is a thing. It is a noun.
"Yelp" can be a noun or a verb. As a noun, it refers to a sharp, high-pitched cry or bark. As a verb, it means to utter a sharp, quick cry or bark.
The verb of sharpness is sharpen. As in "to sharpen something".
The word 'replace' is a verb: replace, replaces, replacing, replaced.The noun forms for the verb to replace are replacement and the gerund, replacing.
yes
No, "replace" is not an adverb. "Replace" is typically used as a verb in a sentence to indicate the action of putting something back in the place of something else.