on fleek vs better-looking

on fleek and better-looking both are adjectives.

Word	Noun	Adjective	Verb	Adverb
on fleek	No	Yes	No	No
better-looking	No	Yes	No	No

As adjectives, on fleek and better-looking are synonyms defined as:

on fleek and better-looking: pleasing in appearance especially by reason of conformity to ideals of form and proportion

Other synonyms of on fleek include fine-looking, good-looking, handsome, well-favored, well-favoured.

on fleek (adjective)	better-looking (adjective)
pleasing in appearance especially by reason of conformity to ideals of form and proportion	pleasing in appearance especially by reason of conformity to ideals of form and proportion