sentiency vs sentience

sentiency and sentience both are nouns.

Word	Noun	Adjective	Verb	Adverb
sentiency	Yes	No	No	No
sentience	Yes	No	No	No

As nouns, sentiency and sentience are synonyms defined as:

sentiency and sentience: the faculty through which the external world is apprehended

Other synonyms of sentiency include sensation, sense, sensory faculty.

sentiency (noun)	sentience (noun)
the faculty through which the external world is apprehended	the readiness to perceive sensations; elementary or undifferentiated consciousness
	the faculty through which the external world is apprehended
	state of elementary or undifferentiated consciousness