defecation vs movement

defecation and movement both are nouns.

Word	Noun	Adjective	Verb	Adverb
defecation	Yes	No	No	No
movement	Yes	No	No	No

As nouns, movement is a hyponym of defecation; that is, movement is a word with a more specific, narrower meaning than defecation:

Other hyponyms of defecation include bm, bowel movement, haematochezia, hematochezia, dump, shit, urochesia, urochezia.

defecation (noun)	movement (noun)
the elimination of fecal waste through the anus	a change of position that does not entail a change of location
	the act of changing the location of something
	a series of actions advancing a principle or tending toward a particular end
	the act of changing location from one place to another
	the driving and regulating parts of a mechanism (as of a watch or clock)
	a general tendency to change (as of opinion)
	a major self-contained part of a symphony or sonata
	a natural event that involves a change in the position or location of something
	a group of people with a common ideology who try together to achieve certain general goals
	an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object
	a euphemism for defecation