part vs stub

part and stub both are nouns.

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

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

part: something less than the whole of a human artifact
stub: the small unused part of something (especially the end of a cigarette that is left after smoking)

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

Other hyponyms of part include body part, corpus, acicula, base, corner, craton, cutting, fragment, hunk, lump, nub, segment, slice, strip, world.

part (noun)	stub (noun)
the actions and activities assigned to or required or expected of a person or group	the small unused part of something (especially the end of a cigarette that is left after smoking)
the effort contributed by a person in bringing about a result	a torn part of a ticket returned to the holder as a receipt
something less than the whole of a human artifact	the part of a check that is retained as a record
an item that is an instance of some type	a short piece remaining on a trunk or stem where a branch is lost
a line of scalp that can be seen when sections of hair are combed in opposite directions	a small piece
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)	stub (verb)
move or break apart	strike (one's toe) accidentally against an object
force, take, or pull apart	clear of weeds by uprooting them
depart for someplace	extinguish by crushing
go one's own way; move apart	pull up (weeds) by their roots
discontinue an association or relation; go different ways

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