No. Superlative is an adjective. The adverb form is superlatively (in a comparative manner).
harder, hardest
Soonest
easily is an adverb and does not have a superlative. easy is an adjective and has the superlative form easiest. eg That was the easiest game we have had.
I'm not familiar with the word, but the comparative degree of an adverb is formed by placing the word "more" in front of it and the superlative degree of an adverb is formed by placing the word "most" in front of it.
It’s actually ‘best’. Better and best are the comparative and superlative forms of both good and well.
tunefully is the adverb, most tunefully the superlative. She sang most tunefully
no it is superlative adjective. not an adverb.
Yes, it can be. Worst can be a superlative adjective or a superlative adverb (meaning most badly).
No, it is an adjective (superlative of kind).The adverb form would be most kindly (superlative of kindly).
harder, hardest
No. Safest is the superlative form of the adjective safe (most safe).The adverb form of safe is safely, and the superlative form of the adverb is most safely.
The word "best" is a comparative (superlative) adjective, not an adverb.
Busiest is not an adverb. It's the superlative form of the adjective busy.
Soonest
easily is an adverb and does not have a superlative. easy is an adjective and has the superlative form easiest. eg That was the easiest game we have had.
Ruby is not an adjective nor adverb. It does not have superlative (or comparative) forms.
The word "superlative" can be a noun, adjective, or adverb depending on how it is used in a sentence.