pen-tailed tree shrew vs pen-tail

pen-tailed tree shrew and pen-tail both are nouns.

Word	Noun	Adjective	Verb	Adverb
pen-tailed tree shrew	Yes	No	No	No
pen-tail	Yes	No	No	No

As nouns, pen-tailed tree shrew and pen-tail are synonyms defined as:

pen-tailed tree shrew and pen-tail: brown tree shrew having a naked tail bilaterally fringed with long stiff hairs on the distal third; of Malaysia

Other synonyms of pen-tailed tree shrew include pentail.

pen-tailed tree shrew (noun)	pen-tail (noun)
brown tree shrew having a naked tail bilaterally fringed with long stiff hairs on the distal third; of Malaysia	brown tree shrew having a naked tail bilaterally fringed with long stiff hairs on the distal third; of Malaysia