rumination vs thoughtfulness

rumination and thoughtfulness both are nouns.

Word	Noun	Adjective	Verb	Adverb
rumination	Yes	No	No	No
thoughtfulness	Yes	No	No	No

As nouns, rumination and thoughtfulness are synonyms defined as:

Other synonyms of rumination include contemplation, musing, reflection, reflexion.

rumination (noun)	thoughtfulness (noun)
regurgitation of small amounts of food; seen in some infants after feeding	a considerate and thoughtful act
(of ruminants) chewing (the cud)	the trait of thinking carefully before acting
a calm, lengthy, intent consideration	kind and considerate regard for others
	a calm, lengthy, intent consideration