limitation vs extremum

limitation and extremum both are nouns.

Word	Noun	Adjective	Verb	Adverb
limitation	Yes	No	No	No
extremum	Yes	No	No	No

As nouns, extremum is a hyponym of limitation; that is, extremum is a word with a more specific, narrower meaning than limitation:

Other hyponyms of limitation include peak, cutoff, sublimit.

limitation (noun)	extremum (noun)
an act of limiting or restricting (as by regulation)	the point located farthest from the middle of something
the quality of being limited or restricted	the most extreme possible amount or value
a principle that limits the extent of something
the greatest amount of something that is possible or allowed
(law) a time period after which suits cannot be brought