There are 12 words that start with 'rumo'.
| rumor | rumors |
| rumour | rumored |
| rumours | rumoring |
| rumoured | rumouring |
| rumormonger | rumormongers |
| rumormongering | rumormongerings |
Note: These 12 words that start with 'rumo' are found from the USA & Canada version of the tournament Scrabble word list.