Open English Wordnet
Nouns
(n)contemplation, reflection, reflexion, rumination, musing, thoughtfulnessa calm, lengthy, intent consideration
Adjectives
(s)brooding, broody, contemplative, meditative, musing, pensive, pondering, reflective, ruminativedeeply or seriously thoughtful“Byron lives on not only in his poetry, but also in his creation of the ‘Byronic hero’ - the persona of a brooding melancholy young man”