reflexion vs Parkinson's law

reflexion and Parkinson's law both are nouns.

Word	Noun	Adjective	Verb	Adverb
reflexion	Yes	No	No	No
Parkinson's law	Yes	No	No	No

reflexion (noun)	Parkinson's law (noun)
the image of something as reflected by a mirror (or other reflective material)	C. Northcote Parkinson's cynical observation that the number of subordinates in an organization will increase linearly regardless of the amount of work to be done
the ability to reflect beams or rays	C. Northcote Parkinson's cynical observation that work will expand so as to fill the time available for its completion
a likeness in which left and right are reversed
a calm, lengthy, intent consideration
a remark expressing careful consideration
expression without words
the phenomenon of a propagating wave (light or sound) being thrown back from a surface