unemotionality vs emotionlessness

unemotionality and emotionlessness both are nouns.

Word	Noun	Adjective	Verb	Adverb
unemotionality	Yes	No	No	No
emotionlessness	Yes	No	No	No

As nouns, unemotionality and emotionlessness are synonyms defined as:

As nouns, unemotionality and emotionlessness are synonyms defined as:

unemotionality and emotionlessness: apathy demonstrated by an absence of emotional reactions

Other synonyms of unemotionality include impassiveness, impassivity, indifference, phlegm, stolidity.

unemotionality (noun)	emotionlessness (noun)
absence of emotion	absence of emotion
apathy demonstrated by an absence of emotional reactions	apathy demonstrated by an absence of emotional reactions