reflectivity vs reflection factor

reflectivity and reflection factor both are nouns.

Word	Noun	Adjective	Verb	Adverb
reflectivity	Yes	No	No	No
reflection factor	Yes	No	No	No

As nouns, reflectivity and reflection factor are synonyms defined as:

reflectivity and reflection factor: the fraction of radiant energy that is reflected from a surface

Other synonyms of reflectivity include coefficient of reflection, reflectance.

reflectivity (noun)	reflection factor (noun)
the ability to reflect beams or rays	the fraction of radiant energy that is reflected from a surface
the capability of quiet thought or contemplation
the fraction of radiant energy that is reflected from a surface