urochordate vs urochord

urochordate and urochord both are nouns.

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

As nouns, urochordate and urochord are synonyms defined as:

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

Other synonyms of urochordate include tunicate.

urochordate (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