motion vs shrug

motion and shrug both are nouns.

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

As nouns, shrug is a hyponym of motion; that is, shrug 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
shrug: a gesture involving the shoulders

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

motion (noun)	shrug (noun)
a change of position that does not entail a change of location	a gesture involving the shoulders
the act of changing location from one place to another
the use of movements (especially of the hands) to communicate familiar or prearranged signals
a formal proposal for action made to a deliberative assembly for discussion and vote
a natural event that involves a change in the position or location of something
an optical illusion of motion produced by viewing a rapid succession of still pictures of a moving object
a state of change

motion (verb)	shrug (verb)
show, express or direct through movement	raise one's shoulders to indicate indifference or resignation