hem in vs border

hem in is not a noun while border is a noun.

Word	Noun	Adjective	Verb	Adverb
hem in	No	No	Yes	No
border	Yes	No	Yes	No

As verbs, border is a hypernym of hem in; that is, border is a word with a broader meaning than hem in:

Other hypernyms of hem in include environ, ring, skirt, surround.

hem in (noun)	border (noun)
	a strip forming the outer edge of something
	a decorative recessed or relieved surface on an edge
	a line that indicates a boundary
	the boundary of a surface
	the boundary line or the area immediately inside the boundary

hem in (verb)	border (verb)
surround so as to force to give up	lie adjacent to another or share a boundary
surround in a restrictive manner	extend on all sides of simultaneously; encircle
	enclose in or as if in a frame
	provide with a border or edge
	form the boundary of; be contiguous to