town vs burg

town and burg both are nouns.

Word	Noun	Adjective	Verb	Adverb
town	Yes	No	No	No
burg	Yes	No	No	No

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

Other hyponyms of town include boom town, cow town, cowtown, ghost town, hometown, Main Street, market town.

town (noun)	burg (noun)
the people living in a municipality smaller than a city	colloquial American term for a town
an urban area with a fixed boundary that is smaller than a city
an administrative division of a county