weatherglass vs barometer

weatherglass and barometer both are nouns.

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

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

weatherglass: a simple barometer for indicating changes in atmospheric pressure
barometer: an instrument that measures atmospheric pressure

weatherglass (noun)	barometer (noun)
a simple barometer for indicating changes in atmospheric pressure	an instrument that measures atmospheric pressure