upper side vs tiptop

upper side and tiptop both are nouns.

Word	Noun	Adjective	Verb	Adverb
upper side	Yes	No	No	No
tiptop	Yes	Yes	No	No

As nouns, tiptop is a hyponym of upper side; that is, tiptop is a word with a more specific, narrower meaning than upper side:

Other hyponyms of upper side include crest, crown, poll, crown, pate, poll, desktop, rooftop.

upper side (noun)	tiptop (noun)
the highest or uppermost side of anything	the extreme top or summit
	the highest level or degree attainable; the highest stage of development

upper side (adjective)	tiptop (adjective)
	of the highest quality