migraine vs megrim

migraine and megrim both are nouns.

Word	Noun	Adjective	Verb	Adverb
migraine	Yes	No	No	No
megrim	Yes	No	No	No

As nouns, migraine and megrim are synonyms defined as:

migraine and megrim: a severe recurring vascular headache; occurs more frequently in women than men

Other synonyms of migraine include hemicrania, sick headache.

migraine (noun)	megrim (noun)
a severe recurring vascular headache; occurs more frequently in women than men	a severe recurring vascular headache; occurs more frequently in women than men