alertness vs attentiveness

alertness and attentiveness both are nouns.

Word	Noun	Adjective	Verb	Adverb
alertness	Yes	No	No	No
attentiveness	Yes	No	No	No

As nouns, attentiveness is a hypernym of alertness; that is, attentiveness is a word with a broader meaning than alertness:

alertness (noun)	attentiveness (noun)
lively attentiveness	the trait of being considerate and thoughtful of others
the process of paying close and continuous attention	the trait of being observant and paying attention
a state of readiness to respond	paying particular notice (as to children or helpless people)