shutter telegraph chain vs semaphore telegraph

shutter telegraph chain and semaphore telegraph both are nouns.

Word	Noun	Adjective	Verb	Adverb
shutter telegraph chain	Yes	No	No	No
semaphore telegraph	Yes	No	No	No

shutter telegraph chain (noun)	semaphore telegraph (noun)
a system of conveying information by means of visual signals, using towers with pivoting shutters; information is encoded by the position of the mechanical elements.	a tower with pivoting shutters, also known as blades or paddles, used for conveying information by means of visual signals, read when the shutter is in a fixed position.