mandrel vs arbor

mandrel and arbor both are nouns.

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

As nouns, mandrel and arbor are synonyms defined as:

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

Other synonyms of mandrel include mandril, spindle.

mandrel (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)