hypervolemia vs hypervolaemia

hypervolemia and hypervolaemia both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypervolemia	Yes	No	No	No
hypervolaemia	Yes	No	No	No

As nouns, hypervolemia and hypervolaemia are synonyms defined as:

hypervolemia and hypervolaemia: a blood disorder consisting of an increase in the volume of circulating blood

hypervolemia (noun)	hypervolaemia (noun)
a blood disorder consisting of an increase in the volume of circulating blood	a blood disorder consisting of an increase in the volume of circulating blood