| referenzieren | reference |
| referieren | refer |
| differenzieren | differentiate distinguish |
| Referentin | speaker |
| Referendarin | student teacher trainee teacher |
| reflektieren | reflect to be interested |
| reformieren | reform |
| fermentieren | ferment |
| Reservieren | reserve |
| reservieren | reserve |
| rezensieren | referee |
| perennieren | consist |
| regenerieren | regenerate recover |
| reglementieren | regulate regularize |
| regredieren | regress |
| restringieren | restrict |
| sezernieren | secrete |
| verunzieren | disfigure mar blemish |
| Referenzbuch | reference book |
| rarefizieren | rarefy |