part vs reduce

part is a noun but reduce is not a noun.

Word	Noun	Adjective	Verb	Adverb
part	Yes	No	Yes	Yes
reduce	No	No	Yes	No

As verbs, reduce is a hyponym of part; that is, reduce is a word with a more specific, narrower meaning than part:

part (noun)	reduce (noun)
the actions and activities assigned to or required or expected of a person or group
the effort contributed by a person in bringing about a result
something less than the whole of a human artifact
an item that is an instance of some type
a line of scalp that can be seen when sections of hair are combed in opposite directions
one of the portions into which something is regarded as divided and which together constitute a whole
an actor's portrayal of someone in a play
that which concerns a person with regard to a particular role or situation
the melody carried by a particular voice or instrument in polyphonic music
the extended spatial location of something
a portion of a natural object
assets belonging to or due to or contributed by an individual person or group
something determined in relation to something that includes it

part (verb)	reduce (verb)
move or break apart	take off weight
force, take, or pull apart	cut down on; make a reduction in
depart for someplace	narrow or limit
go one's own way; move apart	cook until very little liquid is left
discontinue an association or relation; go different ways	to remove oxygen from a compound, or cause to react with hydrogen or form a hydride, or to undergo an increase in the number of electrons
	make smaller
	reduce in size; reduce physically
	make less complex
	reduce in scope while retaining essential elements
	lessen the strength or flavor of a solution or mixture
	be cooked until very little liquid is left
	be the essential element
	destress and thus weaken a sound when pronouncing it
	undergo meiosis
	reposition (a broken bone after surgery) back to its normal site
	lower in grade or rank or force somebody into an undignified situation
	lessen and make more modest
	simplify the form of a mathematical equation of expression by substituting one term for another
	bring to humbler or weaker state or condition
	put down by force or intimidation

part (adverb)	reduce (adverb)
to some extent; in some degree; not wholly