| Wirkstoff | active substance |
| Werkstoff | material |
| Wertstoff | recyclable material |
| Stickstoff | nitrogen azote |
| Hornstoff | keratin |
| Nickistoff | velveteen |
| Farbstoff | dye |
| Giftstoff | poison |
| Harnstoff | urea |
| Wirrkopf | airhead |
| wirksam | effective efficacious |
| Werkstein | ashlar |
| Werkstatt | workshop automobile repair shop garage |
| Werkstück | workpiece |
| Workshop | workshop |
| Christof | Christopher |
| Dichtstoff | mastic |
| Gelbstoff | gelbstoff |
| Hilfsstoff | excipient |
| Lesestoff | reading material |