uriniferous tubule vs nephron

uriniferous tubule and nephron both are nouns.

Word	Noun	Adjective	Verb	Adverb
uriniferous tubule	Yes	No	No	No
nephron	Yes	No	No	No

As nouns, uriniferous tubule and nephron are synonyms defined as:

uriniferous tubule and nephron: any of the small tubules that are the excretory units of the vertebrate kidney

uriniferous tubule (noun)	nephron (noun)
any of the small tubules that are the excretory units of the vertebrate kidney	any of the small tubules that are the excretory units of the vertebrate kidney