Difficult and Head ache

Difficult adjective - Requiring considerable physical or mental effort.

Head ache and difficult are semantically related. In some cases you can replace phrase "Head ache" with "Difficult", this terms are similar.

Nearby Word: difficulty

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

Difficult and head ache are semantically related. Sometimes you can use "Difficult" instead an adjective phrase "Head ache".