jellyfish vs siphonophore

jellyfish and siphonophore both are nouns.

Word	Noun	Adjective	Verb	Adverb
jellyfish	Yes	No	No	No
siphonophore	Yes	No	No	No

As nouns, siphonophore is a hypernym of jellyfish; that is, siphonophore is a word with a broader meaning than jellyfish:

jellyfish: large siphonophore having a bladderlike float and stinging tentacles
siphonophore: a floating or swimming oceanic colony of polyps often transparent or showily colored

jellyfish (noun)	siphonophore (noun)
any of numerous usually marine and free-swimming coelenterates that constitute the sexually reproductive forms of hydrozoans and scyphozoans	a floating or swimming oceanic colony of polyps often transparent or showily colored
large siphonophore having a bladderlike float and stinging tentacles