jet stream vs airstream

jet stream and airstream both are nouns.

Word	Noun	Adjective	Verb	Adverb
jet stream	Yes	No	No	No
airstream	Yes	No	No	No

As nouns, airstream is a hypernym of jet stream; that is, airstream is a word with a broader meaning than jet stream:

jet stream: a high-speed high-altitude airstream blowing from west to east near the top of the troposphere; has important effects of the formation of weather fronts
airstream: a relatively well-defined prevailing wind

jet stream (noun)	airstream (noun)
a high-speed high-altitude airstream blowing from west to east near the top of the troposphere; has important effects of the formation of weather fronts	a relatively well-defined prevailing wind
	the flow of air that is driven backwards by an aircraft propeller