motion vs bow

motion and bow both are nouns.

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

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

motion: the use of movements (especially of the hands) to communicate familiar or prearranged signals
bow: bending the head or body or knee as a sign of reverence or submission or shame or greeting

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

motion (noun)	bow (noun)
a change of position that does not entail a change of location	a stroke with a curved piece of wood with taut horsehair strands that is used in playing stringed instruments
the act of changing location from one place to another	a slightly curved piece of resilient wood with taut horsehair strands; used in playing certain stringed instruments
the use of movements (especially of the hands) to communicate familiar or prearranged signals	a weapon for shooting arrows, composed of a curved piece of resilient wood with a taut cord to propel the arrow
a formal proposal for action made to a deliberative assembly for discussion and vote	a knot with two loops and loose ends; used to tie shoelaces
a natural event that involves a change in the position or location of something	a decorative interlacing of ribbons
an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object	something curved in shape
a state of change	front part of a vessel or aircraft
	an appearance by actors or performers at the end of the concert or play in order to acknowledge the applause of the audience
	bending the head or body or knee as a sign of reverence or submission or shame or greeting

motion (verb)	bow (verb)
show, express or direct through movement	bend one's knee or body, or lower one's head
	yield to another's wish or opinion
	bend the head or the upper part of the body in a gesture of respect or greeting
	bend one's back forward from the waist on down
	play on a stringed instrument with a bow