straightjacket vs straitjacket

straightjacket and straitjacket both are nouns.

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

As nouns, straightjacket and straitjacket are synonyms defined as:

straightjacket and straitjacket: 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

straightjacket (noun)	straitjacket (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	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
	anything immaterial that severely hinders or confines