| verb | reflect deeply on a subject “I mulled over the events of the afternoon” |
| adjective | deeply 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” |
| meditative | adjective | deeply or seriously thoughtful |
| meditation | noun | continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature |
| ponderer | noun | a reflective thinker characterized by quiet contemplation |
| excogitative | adjective | concerned with excogitating or having the power of excogitation |
| contemplative | adjective | deeply or seriously thoughtful |
| contemplation | noun | a calm, lengthy, intent consideration |
| muse | noun | the source of an artist's inspiration |
| muser | noun | a reflective thinker characterized by quiet contemplation |
| musing | noun | a calm, lengthy, intent consideration |
| reflective | adjective | deeply or seriously thoughtful |
| muller | noun | a reflective thinker characterized by quiet contemplation |
| ruminative | adjective | deeply or seriously thoughtful |
| rumination | noun | a calm, lengthy, intent consideration |
| ruminator | noun | a reflective thinker characterized by quiet contemplation |
| speculative | adjective | showing curiosity |
| speculation | noun | continuous and profound contemplation or musing on a subject or series of subjects of a deep or abstruse nature |
| contemplate | verb | reflect deeply on a subject |
| contemplativeness | noun | deep serious thoughtfulness |
| meditativeness | noun | deep serious thoughtfulness |
| meditate | verb | think intently and at length, as for spiritual purposes |
| pensiveness | noun | persistent morbid meditation on a problem |
| reflectivity | noun | the capability of quiet thought or contemplation |
| reflect | verb | reflect deeply on a subject |
| ruminate | verb | reflect deeply on a subject |