extremum vs extreme point

extremum and extreme point both are nouns.

Word	Noun	Adjective	Verb	Adverb
extremum	Yes	No	No	No
extreme point	Yes	No	No	No

As nouns, extremum and extreme point are synonyms defined as:

extremum and extreme point: the point located farthest from the middle of something

Other synonyms of extremum include extreme.

extremum (noun)	extreme point (noun)
the point located farthest from the middle of something	the point located farthest from the middle of something
the most extreme possible amount or value