| put on thinking cap(verb, expression, idiom, consider, plan) |
| puzzle |
| reason(verb, consider, examine, deliberate, speculate) |
| reflect(verb, consider, plan, examine, figure) |
| revolve(verb, consider, plan, examine, figure) |
| roll(verb, consider, plan, design, examine) |
| ruminate(verb, consider, examine, figure, deliberate) |
| say to oneself(verb, expression, idiom, consider, plan) |
| scheme(verb, consider, plan, design, figure) |
| speculate(verb, consider, figure, deliberate, contemplate) |
| stew |
| stew over |
| stick |
| study(verb, consider, figure, deliberate, contemplate) |
| stupefy |
| think(verb, consider, plan, design, figure) |
| think about(verb, expression, consider, deliberate, feel) |
| think deeply(verb, expression, consider, plan, design) |
| think hard |
| think out(verb, expression, phrasal verb, consider, examine) |