irresistible impulse vs compulsion

irresistible impulse and compulsion both are nouns.

Word	Noun	Adjective	Verb	Adverb
irresistible impulse	Yes	No	No	No
compulsion	Yes	No	No	No

As nouns, irresistible impulse and compulsion are synonyms defined as:

irresistible impulse and compulsion: an urge to do or say something that might be better left undone or unsaid

irresistible impulse (noun)	compulsion (noun)
an urge to do or say something that might be better left undone or unsaid	using force to cause something to occur
	an irrational motive for performing trivial or repetitive actions, even against your will
	an urge to do or say something that might be better left undone or unsaid