Synonyms for headache

Noun

1. concern, worry, headache, vexation, negative stimulus

usage: something or someone that causes anxiety; a source of unhappiness; "New York traffic is a constant concern"; "it's a major worry"

2. headache, head ache, cephalalgia, ache, aching

usage: pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs