butt vs portion

butt and portion both are nouns.

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

As nouns, portion is a hypernym of butt; that is, portion is a word with a broader meaning than butt:

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

Other hypernyms of butt include part.

As nouns, portion is a hypernym of butt; that is, portion is a word with a broader meaning than butt:

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

Other hypernyms of butt include component, component part, constituent, part.

butt (noun)	portion (noun)
thick end of the handle	the allotment of some amount by dividing something
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 individual quantity of food or drink taken as part of a meal
sports equipment consisting of an object set up for a marksman or archer to aim at	assets belonging to or due to or contributed by an individual person or group
finely ground tobacco wrapped in paper; for smoking	money or property brought by a woman to her husband at marriage
a joint made by fastening ends together without overlapping	something determined in relation to something that includes it
the fleshy part of the human body that you sit on	your overall circumstances or condition in life (including everything that happens to you)
a victim of ridicule or pranks
the part of a plant from which the roots spring or the part of a stalk or trunk nearest the roots

butt (verb)	portion (verb)
to strike, thrust or shove against	give out
place end to end without overlapping
lie adjacent to another or share a boundary