| in step with(expression, idiom) |
| in sync |
| in sync with(expression, adjective, idiom, friendly, appropriate) |
| in synchronization |
| in the groove(expression, adjective, idiom, friendly, appropriate) |
| in uniformity with(expression, idiom) |
| inaccordance |
| inharmony |
| like(adjective, sweet, agreeable, sympathetic, suitable) |
| matching(adjective, sweet, agreeable, sympathetic, suitable) |
| meet(adjective, friendly, appropriate, agreeable, suitable) |
| mellifluous(adjective, sweet, agreeable, sympathetic, suitable) |
| melodic(adjective, sweet, agreeable, sympathetic, suitable) |
| melodious(adjective, sweet, agreeable, sympathetic, suitable) |
| mix(adjective, sweet, agreeable, sympathetic, suitable) |
| musical(adjective, sweet, agreeable, sympathetic, suitable) |
| of a piece(expression, idiom) |
| on all fours(expression, idiom) |
| on same wavelength(expression, adjective, idiom, sweet, agreeable) |
| on the same wavelength(expression, adjective, idiom, friendly, appropriate) |