columniation vs placement

columniation and placement both are nouns.

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

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

columniation: (architecture) the arrangement of columns (especially freestanding columns) in a structure
placement: the spatial property of the way in which something is placed

Other hypernyms of columniation include arrangement.

columniation (noun)	placement (noun)
(architecture) the arrangement of columns (especially freestanding columns) in a structure	the act of putting something in a certain place
	contact established between applicants and prospective employees
	the spatial property of the way in which something is placed