chassis vs material body

chassis and material body both are nouns.

Word	Noun	Adjective	Verb	Adverb
chassis	Yes	No	No	No
material body	Yes	No	No	No

As nouns, chassis and material body are synonyms defined as:

chassis and material body: alternative names for the body of a human being

Other synonyms of chassis include anatomy, bod, build, figure, flesh, form, frame, human body, physical body, physique, shape, soma.

chassis (noun)	material body (noun)
the skeleton of a motor vehicle consisting of a steel frame supported on springs that holds the body and motor	alternative names for the body of a human being
a metal mounting for the circuit components of an electronic device
alternative names for the body of a human being