diriment impediment vs balk

diriment impediment and balk both are nouns.

Word	Noun	Adjective	Verb	Adverb
diriment impediment	Yes	No	No	No
balk	Yes	No	Yes	No

As nouns, balk is a hypernym of diriment impediment; that is, balk is a word with a broader meaning than diriment impediment:

diriment impediment: (canon law) an impediment that invalidates a marriage (such as the existence of a prior marriage)
balk: something immaterial that interferes with or delays action or progress

Other hypernyms of diriment impediment include baulk, check, deterrent, handicap, hinderance, hindrance, impediment.

diriment impediment (noun)	balk (noun)
(canon law) an impediment that invalidates a marriage (such as the existence of a prior marriage)	an illegal pitching motion while runners are on base
	one of several parallel sloping beams that support a roof
	something immaterial that interferes with or delays action or progress
	the area on a billiard table behind the balkline

diriment impediment (verb)	balk (verb)
	refuse to comply