barograph vs barometer

barograph and barometer both are nouns.

Word	Noun	Adjective	Verb	Adverb
barograph	Yes	No	No	No
barometer	Yes	No	No	No

As nouns, barometer is a hypernym of barograph; that is, barometer is a word with a broader meaning than barograph:

barograph: a recording barometer; automatically records on paper the variations in atmospheric pressure
barometer: an instrument that measures atmospheric pressure

barograph (noun)	barometer (noun)
a recording barometer; automatically records on paper the variations in atmospheric pressure	an instrument that measures atmospheric pressure