altimeter vs measuring device

altimeter and measuring device both are nouns.

Word	Noun	Adjective	Verb	Adverb
altimeter	Yes	No	No	No
measuring device	Yes	No	No	No

As nouns, measuring device is a hypernym of altimeter; that is, measuring device is a word with a broader meaning than altimeter:

altimeter: an instrument that measures the height above ground; used in navigation
measuring device: instrument that shows the extent or amount or quantity or degree of something

Other hypernyms of altimeter include measuring instrument, measuring system.

altimeter (noun)	measuring device (noun)
an instrument that measures the height above ground; used in navigation	instrument that shows the extent or amount or quantity or degree of something