A-one vs top-notch

A-one and top-notch both are adjectives.

Word	Noun	Adjective	Verb	Adverb
A-one	No	Yes	No	No
top-notch	No	Yes	No	No

As adjectives, A-one and top-notch are synonyms defined as:

Other synonyms of A-one include ace, crack, first-rate, super, tiptop, topnotch, tops.

A-one (adjective)	top-notch (adjective)
of the highest quality	of the highest quality