attentiveness vs thoughtful

attentiveness is a noun but thoughtful is not a noun.

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

attentiveness (noun)	thoughtful (noun)
the trait of being considerate and thoughtful of others
the trait of being observant and paying attention
paying particular notice (as to children or helpless people)

attentiveness (adjective)	thoughtful (adjective)
	exhibiting or characterized by careful thought
	taking heed; giving close and thoughtful attention
	considerate of the feelings or well-being of others
	having intellectual depth
	characterized by solemn, sincere manner