syncytium vs cytoplasm

syncytium and cytoplasm both are nouns.

Word	Noun	Adjective	Verb	Adverb
syncytium	Yes	No	No	No
cytoplasm	Yes	No	No	No

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

syncytium: a mass of cytoplasm containing several nuclei and enclosed in a membrane but no internal cell boundaries (as in muscle fibers)
cytoplasm: the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism

Other hypernyms of syncytium include cytol.

syncytium (noun)	cytoplasm (noun)
a mass of cytoplasm containing several nuclei and enclosed in a membrane but no internal cell boundaries (as in muscle fibers)	the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism