straitjacket vs balk

straitjacket and balk both are nouns.

Word	Noun	Adjective	Verb	Adverb
straitjacket	Yes	No	No	No
balk	Yes	No	Yes	No

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

straitjacket: anything immaterial that severely hinders or confines
balk: something immaterial that interferes with or delays action or progress

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

straitjacket (noun)	balk (noun)
a garment similar to a jacket that is used to bind the arms tightly against the body as a means of restraining a violent person	an illegal pitching motion while runners are on base
anything immaterial that severely hinders or confines	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

straitjacket (verb)	balk (verb)
	refuse to comply