border vs property line

border and property line both are nouns.

Word	Noun	Adjective	Verb	Adverb
border	Yes	No	Yes	No
property line	Yes	No	No	No

As nouns, property line is a hyponym of border; that is, property line is a word with a more specific, narrower meaning than border:

Other hyponyms of border include circuit, circumference, fence line, state boundary, state line.

border (noun)	property line (noun)
a strip forming the outer edge of something	the boundary line between two pieces of property
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

border (verb)	property line (verb)
lie adjacent to another or share a boundary
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