There are 13 words that start with 'elast'.
| elastic | elastin | elastase | 
| elastics | elastins | elastases | 
| elastomer | elasticity | elastomers | 
| elastically | elasticized | elastomeric | 
| elasticities | ||
Note: These 13 words that start with 'elast' are found from the USA & Canada version of the tournament Scrabble word list.