protoplasm vs living substance

protoplasm and living substance both are nouns.

Word	Noun	Adjective	Verb	Adverb
protoplasm	Yes	No	No	No
living substance	Yes	No	No	No

As nouns, protoplasm and living substance are synonyms defined as:

protoplasm and living substance: the substance of a living cell (including cytoplasm and nucleus)

protoplasm (noun)	living substance (noun)
the substance of a living cell (including cytoplasm and nucleus)	the substance of a living cell (including cytoplasm and nucleus)