vexation vs red flag

vexation and red flag both are nouns.

Word	Noun	Adjective	Verb	Adverb
vexation	Yes	No	No	No
red flag	Yes	No	No	No

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

Other hyponyms of vexation include exasperation.

vexation (noun)	red flag (noun)
the act of troubling or annoying someone	something that irritates or demands immediate action
something or someone that causes anxiety; a source of unhappiness	a flag that serves as a warning signal
anger produced by some annoying irritation	the emblem of socialist revolution
the psychological state of being irritated or annoyed