sleeplessness vs wakefulness

sleeplessness and wakefulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
sleeplessness	Yes	No	No	No
wakefulness	Yes	No	No	No

As nouns, sleeplessness and wakefulness are synonyms defined as:

sleeplessness and wakefulness: a temporary state in which you are unable (or unwilling) to sleep

sleeplessness (noun)	wakefulness (noun)
a temporary state in which you are unable (or unwilling) to sleep	a periodic state during which you are conscious and aware of the world
	the process of paying close and continuous attention
	a temporary state in which you are unable (or unwilling) to sleep