| verb | come up with (an idea, plan, explanation, theory, or principle) after a mental effort “excogitate a way to measure the speed of light” |
| verb | reflect deeply on a subject “I mulled over the events of the afternoon” |
| inventive | adjective | (used of persons or artifacts) marked by independence and creativity in thought or action; ; - Lewis Mumford |
| invention | noun | the creation of something in the mind |
| inventor | noun | someone who is the first to think of or make something |
| contrivance | noun | the act of devising something |
| deviser | noun | a person who makes plans |
| devising | noun | the act that results in something coming to be |
| devisal | noun | the act of devising something |
| excogitation | noun | the creation of something in the mind |
| excogitator | noun | a thinker who considers carefully and thoroughly |
| formula | noun | a conventionalized statement expressing some fundamental principle |
| formulation | noun | inventing or contriving an idea or explanation and formulating it mentally |
| 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 |