part vs butt

part and butt both are nouns.

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

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

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

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

part: something determined in relation to something that includes it
butt: the part of a plant from which the roots spring or the part of a stalk or trunk nearest the roots

part (noun)	butt (noun)
the actions and activities assigned to or required or expected of a person or group	thick end of the handle
the effort contributed by a person in bringing about a result	the small unused part of something (especially the end of a cigarette that is left after smoking)
something less than the whole of a human artifact	a large cask (especially one holding a volume equivalent to 2 hogsheads or 126 gallons)
an item that is an instance of some type	sports equipment consisting of an object set up for a marksman or archer to aim at
a line of scalp that can be seen when sections of hair are combed in opposite directions	finely ground tobacco wrapped in paper; for smoking
one of the portions into which something is regarded as divided and which together constitute a whole	a joint made by fastening ends together without overlapping
an actor's portrayal of someone in a play	the fleshy part of the human body that you sit on
that which concerns a person with regard to a particular role or situation	a victim of ridicule or pranks
the melody carried by a particular voice or instrument in polyphonic music	the part of a plant from which the roots spring or the part of a stalk or trunk nearest the roots
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)	butt (verb)
move or break apart	to strike, thrust or shove against
force, take, or pull apart	place end to end without overlapping
depart for someplace	lie adjacent to another or share a boundary
go one's own way; move apart
discontinue an association or relation; go different ways

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