dickey-seat vs dicky

dickey-seat and dicky both are nouns.

Word	Noun	Adjective	Verb	Adverb
dickey-seat	Yes	No	No	No
dicky	Yes	Yes	No	No

As nouns, dickey-seat and dicky are synonyms defined as:

dickey-seat and dicky: a small third seat in the back of an old-fashioned two-seater

Other synonyms of dickey-seat include dickey, dickie-seat, dickie, dicky-seat.

dickey-seat (noun)	dicky (noun)
a small third seat in the back of an old-fashioned two-seater	a man's detachable insert (usually starched) to simulate the front of a shirt
	a small third seat in the back of an old-fashioned two-seater

dickey-seat (adjective)	dicky (adjective)
	(British informal) faulty