sandwich vs western

sandwich and western both are nouns.

Word	Noun	Adjective	Verb	Adverb
sandwich	Yes	No	Yes	No
western	Yes	Yes	No	No

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

sandwich (noun)	western (noun)
two (or more) slices of bread with a filling between them	a sandwich made from a western omelet

sandwich (adjective)	western (adjective)
	relating to or characteristic of the western parts of the world or the West as opposed to the eastern or oriental parts
	of or characteristic of regions of the United States west of the Mississippi River
	lying toward or situated in the west
	of wind; from the west

sandwich (verb)	western (verb)
insert or squeeze tightly between two people or objects
make into a sandwich