straitjacket vs straightjacket

straitjacket and straightjacket both are nouns.

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

As nouns, straitjacket and straightjacket are synonyms defined as:

straitjacket and straightjacket: 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

straitjacket (noun)	straightjacket (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