akinesia vs akinesis

akinesia and akinesis both are nouns.

Word	Noun	Adjective	Verb	Adverb
akinesia	Yes	No	No	No
akinesis	Yes	No	No	No

As nouns, akinesia and akinesis are synonyms defined as:

akinesia and akinesis: motionlessness attributable to a temporary paralysis

akinesia (noun)	akinesis (noun)
motionlessness attributable to a temporary paralysis	motionlessness attributable to a temporary paralysis