disapprobation vs disapproval

disapprobation and disapproval both are nouns.

Word	Noun	Adjective	Verb	Adverb
disapprobation	Yes	No	No	No
disapproval	Yes	No	No	No

As nouns, disapproval is a hypernym of disapprobation; that is, disapproval is a word with a broader meaning than disapprobation:

disapprobation: an expression of strong disapproval; pronouncing as wrong or morally culpable
disapproval: the expression of disapproval

disapprobation (noun)	disapproval (noun)
an expression of strong disapproval; pronouncing as wrong or morally culpable	the act of disapproving or condemning
	an inclination to withhold approval from some person or group
	the expression of disapproval
	a feeling of disliking something or what someone is doing