dialysis machine vs dialyzer

dialysis machine and dialyzer both are nouns.

Word	Noun	Adjective	Verb	Adverb
dialysis machine	Yes	No	No	No
dialyzer	Yes	No	No	No

As nouns, dialysis machine and dialyzer are synonyms defined as:

dialysis machine and dialyzer: a medical instrument for separating substances in solution by unequal diffusion through semipermeable membranes

dialysis machine (noun)	dialyzer (noun)
a medical instrument for separating substances in solution by unequal diffusion through semipermeable membranes	a medical instrument for separating substances in solution by unequal diffusion through semipermeable membranes