myopia vs nearsightedness

myopia and nearsightedness both are nouns.

Word	Noun	Adjective	Verb	Adverb
myopia	Yes	No	No	No
nearsightedness	Yes	No	No	No

As nouns, myopia and nearsightedness are synonyms defined as:

myopia and nearsightedness: (ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred

Other synonyms of myopia include shortsightedness.

myopia (noun)	nearsightedness (noun)
(ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred	(ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred