tiptop vs top side

tiptop and top side both are nouns.

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

As nouns, top side is a hypernym of tiptop; that is, top side is a word with a broader meaning than tiptop:

Other hypernyms of tiptop include top, upper side, upside.

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

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