last straw vs provocation

last straw and provocation both are nouns.

Word	Noun	Adjective	Verb	Adverb
last straw	Yes	No	No	No
provocation	Yes	No	No	No

As nouns, provocation is a hypernym of last straw; that is, provocation is a word with a broader meaning than last straw:

last straw: the final irritation that stretches your patience beyond the limit
provocation: unfriendly behavior that causes anger or resentment

Other hypernyms of last straw include aggravation, irritation.

last straw (noun)	provocation (noun)
the final irritation that stretches your patience beyond the limit	unfriendly behavior that causes anger or resentment
	needed encouragement
	something that incites or provokes; a means of arousing or stirring to action