edge vs berm

edge and berm both are nouns.

Word	Noun	Adjective	Verb	Adverb
edge	Yes	No	Yes	No
berm	Yes	No	No	No

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

edge: the outside limit of an object or area or surface; a place farthest away from the center of something
berm: a narrow edge of land (usually unpaved) along the side of a road

Other hyponyms of edge include border, hem, luff, border, molding, moulding, selvage, selvedge, shoulder, roadside, wayside.

edge (noun)	berm (noun)
a sharp side formed by the intersection of two surfaces of an object	a narrow edge of land (usually unpaved) along the side of a road
the outside limit of an object or area or surface; a place farthest away from the center of something	a narrow ledge or shelf typically at the top or bottom of a slope
a slight competitive advantage
the attribute of urgency in tone of voice
the boundary of a surface
a line determining the limits of an area

edge (verb)	berm (verb)
lie adjacent to another or share a boundary
provide with an edge
advance slowly, as if by inches
provide with a border or edge