isopieze vs isopleth

isopieze and isopleth both are nouns.

Word	Noun	Adjective	Verb	Adverb
isopieze	Yes	No	No	No
isopleth	Yes	No	No	No

As nouns, isopleth is a hypernym of isopieze; that is, isopleth is a word with a broader meaning than isopieze:

isopieze: a line on a map connecting places with equal ground water pressure.
isopleth: a line drawn on a map connecting points having the same numerical value of some variable

Other hypernyms of isopieze include isarithm, isogram.

isopieze (noun)	isopleth (noun)
a line on a map connecting places with equal ground water pressure.	a line drawn on a map connecting points having the same numerical value of some variable