indicator lamp vs pilot lamp

indicator lamp and pilot lamp both are nouns.

Word	Noun	Adjective	Verb	Adverb
indicator lamp	Yes	No	No	No
pilot lamp	Yes	No	No	No

As nouns, indicator lamp and pilot lamp are synonyms defined as:

indicator lamp and pilot lamp: indicator consisting of a light to indicate whether power is on or a motor is in operation

Other synonyms of indicator lamp include pilot light.

indicator lamp (noun)	pilot lamp (noun)
indicator consisting of a light to indicate whether power is on or a motor is in operation	indicator consisting of a light to indicate whether power is on or a motor is in operation