rendering machine vs plaster machine

rendering machine and plaster machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
rendering machine	Yes	No	No	No
plaster machine	Yes	No	No	No

As nouns, rendering machine and plaster machine are synonyms defined as:

Other synonyms of rendering machine include plastering machine.

rendering machine (noun)	plaster machine (noun)
a machine for wall rendering.	a machine for wall rendering.