hypervolaemia vs hypervolemia

hypervolaemia and hypervolemia both are nouns.

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

As nouns, hypervolaemia and hypervolemia are synonyms defined as:

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

hypervolaemia (noun)	hypervolemia (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