chassis vs mounting

chassis and mounting both are nouns.

Word	Noun	Adjective	Verb	Adverb
chassis	Yes	No	No	No
mounting	Yes	No	No	No

As nouns, mounting is a hypernym of chassis; that is, mounting is a word with a broader meaning than chassis:

chassis: a metal mounting for the circuit components of an electronic device
mounting: framework used for support or display

chassis (noun)	mounting (noun)
the skeleton of a motor vehicle consisting of a steel frame supported on springs that holds the body and motor	framework used for support or display
a metal mounting for the circuit components of an electronic device	an event that involves rising to a higher point (as in altitude or temperature or intensity etc.)
alternative names for the body of a human being