edge vs trailing edge

edge and trailing edge both are nouns.

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

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

edge (noun)	trailing edge (noun)
a sharp side formed by the intersection of two surfaces of an object	the rear edge of an airfoil
the outside limit of an object or area or surface; a place farthest away from the center of something
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)	trailing edge (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