mandril vs arbor

mandril and arbor both are nouns.

Word	Noun	Adjective	Verb	Adverb
mandril	Yes	No	No	No
arbor	Yes	No	No	No

As nouns, mandril and arbor are synonyms defined as:

mandril and arbor: any of various rotating shafts that serve as axes for larger rotating parts

Other synonyms of mandril include mandrel, spindle.

mandril (noun)	arbor (noun)
any of various rotating shafts that serve as axes for larger rotating parts	a framework that supports climbing plants
	any of various rotating shafts that serve as axes for larger rotating parts
	tree (as opposed to shrub)