juxtaposition vs placement

juxtaposition and placement both are nouns.

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

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

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

juxtaposition (noun)	placement (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	contact established between applicants and prospective employees
	the spatial property of the way in which something is placed