wakefulness vs vigilance

wakefulness and vigilance both are nouns.

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

As nouns, wakefulness and vigilance are synonyms defined as:

wakefulness and vigilance: the process of paying close and continuous attention

Other synonyms of wakefulness include alertness, watchfulness.

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