| Infloreszenz | inflorescence |
| Fluoreszenz | fluorescence |
| Inferenz | inference |
| einflößen | infuse instill |
| Florenz | Florence |
| anfressen | fret |
| Interessent | interested party potential buyer potential customer prospect prospective buyer prospective customer applicant interested person |
| Adoleszenz | adolescence |
| Koaleszenz | coalescence |
| Obsoleszenz | obsolescence |
| Ingredienz | ingredient component |
| Infigieren | infixation |
| Informant | ear informant |
| informell | casual informal |
| informiert | enlightened |
| Influenz | influence |
| infiltrieren | infiltrate |
| infizieren | infect |
| infolgedessen | hence consequently |
| informieren | inform let know |