goniometer vs direction finder

goniometer and direction finder both are nouns.

Word	Noun	Adjective	Verb	Adverb
goniometer	Yes	No	No	No
direction finder	Yes	No	No	No

As nouns, direction finder is a hypernym of goniometer; that is, direction finder is a word with a broader meaning than goniometer:

goniometer: direction finder that determines the angular direction of incoming radio signals
direction finder: radio; determines the direction of incoming radio waves

goniometer (noun)	direction finder (noun)
direction finder that determines the angular direction of incoming radio signals	radio; determines the direction of incoming radio waves