tunicate vs urochord

tunicate and urochord both are nouns.

Word	Noun	Adjective	Verb	Adverb
tunicate	Yes	No	No	No
urochord	Yes	No	No	No

As nouns, tunicate and urochord are synonyms defined as:

tunicate and urochord: primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva

Other synonyms of tunicate include urochordate.

tunicate (noun)	urochord (noun)
primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva	a notochord of a larval tunicate typically confined to the caudal region
	primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva