dicky-seat vs dickey

dicky-seat and dickey both are nouns.

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

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

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

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

dicky-seat (noun)	dickey (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

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