There are 18 words that start with 'lubr'.
| lubric | lubrical | lubricant | 
| lubricate | lubricity | lubricous | 
| lubricants | lubricated | lubricates | 
| lubricator | lubricious | lubricating | 
| lubrication | lubricative | lubricators | 
| lubricities | lubrications | lubriciously | 
Note: These 18 words that start with 'lubr' are found from the USA & Canada version of the tournament Scrabble word list.