cytoplasm vs living substance

cytoplasm and living substance both are nouns.

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

As nouns, living substance is a hypernym of cytoplasm; that is, living substance is a word with a broader meaning than cytoplasm:

cytoplasm: the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism
living substance: the substance of a living cell (including cytoplasm and nucleus)

Other hypernyms of cytoplasm include protoplasm.

cytoplasm (noun)	living substance (noun)
the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism	the substance of a living cell (including cytoplasm and nucleus)