protoplasm vs plasm

protoplasm and plasm both are nouns.

Word	Noun	Adjective	Verb	Adverb
protoplasm	Yes	No	No	No
plasm	Yes	No	No	No

As nouns, plasm is a hyponym of protoplasm; that is, plasm is a word with a more specific, narrower meaning than protoplasm:

protoplasm: the substance of a living cell (including cytoplasm and nucleus)
plasm: the protoplasm of the germ cells that contains chromosomes and genes

Other hyponyms of protoplasm include cytol, cytoplasm, karyoplasm, nucleoplasm, germ plasm, blood platelet, platelet, thrombocyte.

protoplasm (noun)	plasm (noun)
the substance of a living cell (including cytoplasm and nucleus)	the protoplasm of the germ cells that contains chromosomes and genes
	the colorless watery fluid of the blood and lymph that contains no cells, but in which the blood cells (erythrocytes, leukocytes, and thrombocytes) are suspended