There are 18 words that start with 'presum'.
| presume | presumed |
| presumer | presumes |
| presumers | presuming |
| presummit | presumable |
| presumably | presumedly |
| presummits | presumingly |
| presumption | presumptive |
| presumptions | presumptuous |
| presumptively | presumptuously |
Note: These 18 words that start with 'presum' are found from the USA & Canada version of the tournament Scrabble word list.