taenia vs cestode

taenia and cestode both are nouns.

Word	Noun	Adjective	Verb	Adverb
taenia	Yes	No	No	No
cestode	Yes	No	No	No

As nouns, cestode is a hypernym of taenia; that is, cestode is a word with a broader meaning than taenia:

taenia: tapeworms parasitic in humans which uses the pig as its intermediate host
cestode: ribbonlike flatworms that are parasitic in the intestines of humans and other vertebrates

Other hypernyms of taenia include tapeworm.

taenia (noun)	cestode (noun)
tapeworms parasitic in humans which uses the pig as its intermediate host	ribbonlike flatworms that are parasitic in the intestines of humans and other vertebrates
a narrow headband or strip of ribbon worn as a headband