myxedema vs myxoedema

myxedema and myxoedema both are nouns.

Word	Noun	Adjective	Verb	Adverb
myxedema	Yes	No	No	No
myxoedema	Yes	No	No	No

As nouns, myxedema and myxoedema are synonyms defined as:

myxedema and myxoedema: hypothyroidism marked by dry skin and swellings around lips and nose as well as mental deterioration

myxedema (noun)	myxoedema (noun)
hypothyroidism marked by dry skin and swellings around lips and nose as well as mental deterioration	hypothyroidism marked by dry skin and swellings around lips and nose as well as mental deterioration