vexation vs pinprick

vexation and pinprick both are nouns.

Word	Noun	Adjective	Verb	Adverb
vexation	Yes	No	No	No
pinprick	Yes	No	No	No

As nouns, pinprick is a hyponym of vexation; that is, pinprick is a word with a more specific, narrower meaning than vexation:

Other hyponyms of vexation include bummer, huff, miff, seeing red, impatience, restlessness, snit.

vexation (noun)	pinprick (noun)
the act of troubling or annoying someone	small puncture (as if made by a pin)
something or someone that causes anxiety; a source of unhappiness	a minor annoyance
anger produced by some annoying irritation
the psychological state of being irritated or annoyed