Head ache and Nudnik

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

Nudnik and head ache are semantically related. in difficult person or situation topic. In some cases you can use "Nudnik" instead a noun phrase "Head ache".

Nudnik noun - One who is obnoxiously annoying.

Head ache and nudnik are semantically related. Sometimes you can replace phrase "Head ache" with "Nudnik", this terms are similar.