isopieze vs isopiestic line

isopieze and isopiestic line both are nouns.

Word	Noun	Adjective	Verb	Adverb
isopieze	Yes	No	No	No
isopiestic line	Yes	No	No	No

As nouns, isopieze and isopiestic line are synonyms defined as:

isopieze and isopiestic line: a line on a map connecting places with equal ground water pressure.

isopieze (noun)	isopiestic line (noun)
a line on a map connecting places with equal ground water pressure.	a line on a map connecting places with equal ground water pressure.