isometrical vs isometry

isometrical is not a noun while isometry is a noun.

Word	Noun	Adjective	Verb	Adverb
isometrical	No	Yes	No	No
isometry	Yes	No	No	No

isometrical (noun)	isometry (noun)
	equality of measure (e.g., equality of height above sea level or equality of loudness etc.)
	equality of elevation above sea level
	a one-to-one mapping of one metric space into another metric space that preserves the distances between each pair of points
	the growth rates in different parts of a growing organism are the same

isometrical (adjective)	isometry (adjective)
having equal dimensions or measurements