There are 17 words that start with 'obel'.
| obeli | obelia | obelus |
| obelias | obelise | obelisk |
| obelism | obelize | obelised |
| obelises | obelisks | obelisms |
| obelized | obelizes | obeliscal |
| obelising | obelizing | |
Note: These 17 words that start with 'obel' are found from the USA & Canada version of the tournament Scrabble word list.