vertex vs acme

vertex and acme both are nouns.

Word	Noun	Adjective	Verb	Adverb
vertex	Yes	No	No	No
acme	Yes	No	No	No

As nouns, vertex and acme are synonyms defined as:

Other synonyms of vertex include apex, peak.

vertex (noun)	acme (noun)
the point of intersection of lines or the point opposite the base of a figure	the highest point (of something)
the highest point (of something)	the highest level or degree attainable; the highest stage of development