capillary vein vs venule

capillary vein and venule both are nouns.

Word	Noun	Adjective	Verb	Adverb
capillary vein	Yes	No	No	No
venule	Yes	No	No	No

As nouns, capillary vein and venule are synonyms defined as:

Other synonyms of capillary vein include venula.

capillary vein (noun)	venule (noun)
a minute vein continuous with a capillary	a minute vein continuous with a capillary