topnotch vs super

topnotch is not a noun while super is a noun.

Word	Noun	Adjective	Verb	Adverb
topnotch	No	Yes	No	No
super	Yes	Yes	No	Yes

As adjectives, topnotch and super are synonyms defined as:

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

topnotch (noun)	super (noun)
	a caretaker for an apartment house; represents the owner as janitor and rent collector

topnotch (adjective)	super (adjective)
of the highest quality	including more than a specified category
	extremely large
	of the highest quality

topnotch (adverb)	super (adverb)
	to an extreme degree