motion vs flow

motion and flow both are nouns.

Word	Noun	Adjective	Verb	Adverb
motion	Yes	No	Yes	No
flow	Yes	No	Yes	No

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

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

motion (noun)	flow (noun)
a change of position that does not entail a change of location	the act of flowing or streaming; continuous progression
the act of changing location from one place to another	the motion characteristic of fluids (liquids or gases)
the use of movements (especially of the hands) to communicate familiar or prearranged signals	dominant course (suggestive of running water) of successive events or ideas
a formal proposal for action made to a deliberative assembly for discussion and vote	any uninterrupted stream or discharge
a natural event that involves a change in the position or location of something	the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object	something that resembles a flowing stream in moving continuously
a state of change	the amount of fluid that flows in a given time

motion (verb)	flow (verb)
show, express or direct through movement	undergo menstruation
	cover or swamp with water
	fall or flow in a certain way
	move along, of liquids
	move or progress freely as if in a stream
	cause to flow
	be abundantly present