nemertine vs nemertean

nemertine and nemertean both are nouns.

Word	Noun	Adjective	Verb	Adverb
nemertine	Yes	No	No	No
nemertean	Yes	No	No	No

As nouns, nemertine and nemertean are synonyms defined as:

nemertine and nemertean: soft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contract

Other synonyms of nemertine include proboscis worm, ribbon worm.

nemertine (noun)	nemertean (noun)
soft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contract	soft unsegmented marine worms that have a threadlike proboscis and the ability to stretch and contract