vexation vs negative stimulus

vexation and negative stimulus both are nouns.

Word	Noun	Adjective	Verb	Adverb
vexation	Yes	No	No	No
negative stimulus	Yes	No	No	No

As nouns, negative stimulus is a hypernym of vexation; that is, negative stimulus is a word with a broader meaning than vexation:

vexation (noun)	negative stimulus (noun)
the act of troubling or annoying someone	a stimulus with undesirable consequences
something or someone that causes anxiety; a source of unhappiness
anger produced by some annoying irritation
the psychological state of being irritated or annoyed