frontier vs bounds

frontier and bounds both are nouns.

Word	Noun	Adjective	Verb	Adverb
frontier	Yes	No	No	No
bounds	Yes	No	No	No

As nouns, bounds is a hypernym of frontier; that is, bounds is a word with a broader meaning than frontier:

frontier: an international boundary or the area (often fortified) immediately inside the boundary
bounds: the line or plane indicating the limit or extent of something

Other hypernyms of frontier include bound, boundary.

frontier (noun)	bounds (noun)
an undeveloped field of study; a topic inviting research and development	the line or plane indicating the limit or extent of something
a wilderness at the edge of a settled area of a country
an international boundary or the area (often fortified) immediately inside the boundary