There are 21 words that start with 'plumb'.
| plumb | plumbs | plumbed |
| plumber | plumbic | plumbum |
| plumbago | plumbers | plumbery |
| plumbing | plumbism | plumbous |
| plumbums | plumbable | plumbagos |
| plumbeous | plumbings | plumbisms |
| plumbness | plumberies | plumbnesses |
Note: These 21 words that start with 'plumb' are found from the USA & Canada version of the tournament Scrabble word list.