thoughtful vs brooding

thoughtful is not a noun while brooding is a noun.

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

thoughtful (noun)	brooding (noun)
	persistent morbid meditation on a problem
	sitting on eggs so as to hatch them by the warmth of the body

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