Head ache and Megrim

Head ache noun - Pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs.

Megrim and head ache are semantically related. in migraine topic. In some cases you can use "Megrim" instead a noun phrase "Head ache", when it comes to topics like serious headache.

Megrim noun - A severe recurring vascular headache; occurs more frequently in women than men.

Head ache and megrim are semantically related. Sometimes you can use "Head ache" instead a noun "Megrim".