"vexation" in the noun sense
1. annoyance, chafe, vexation
anger produced by some annoying irritation
2. irritation, annoyance, vexation, botheration
the psychological state of being irritated or annoyed
3. concern, worry, headache, vexation
something or someone that causes anxiety a source of unhappiness
"New York traffic is a constant concern"
"it's a major worry"
4. annoyance, annoying, irritation, vexation
the act of troubling or annoying someone
Source: WordNet® (An amazing lexical database of English)
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