juxtaposition vs emplacement

juxtaposition and emplacement both are nouns.

Word	Noun	Adjective	Verb	Adverb
juxtaposition	Yes	No	No	No
emplacement	Yes	No	No	No

As nouns, emplacement is a hypernym of juxtaposition; that is, emplacement is a word with a broader meaning than juxtaposition:

Other hypernyms of juxtaposition include locating, location, placement, position, positioning.

juxtaposition (noun)	emplacement (noun)
the act of positioning close together (or side by side)	the act of putting something in a certain place
a side-by-side position	military installation consisting of a prepared position for siting a weapon