turn indicator vs turn signal

turn indicator and turn signal both are nouns.

Word	Noun	Adjective	Verb	Adverb
turn indicator	Yes	No	No	No
turn signal	Yes	No	No	No

As nouns, turn indicator and turn signal are synonyms defined as:

turn indicator and turn signal: a blinking light on a motor vehicle that indicates the direction in which the vehicle is about to turn

Other synonyms of turn indicator include blinker, trafficator.

turn indicator (noun)	turn signal (noun)
a blinking light on a motor vehicle that indicates the direction in which the vehicle is about to turn	a blinking light on a motor vehicle that indicates the direction in which the vehicle is about to turn