There are 13 words that start with 'multim'.
| multimode | multimedia | 
| multimodal | multimanned | 
| multimedias | multimember | 
| multimegaton | multimillion | 
| multimegawatt | multimetallic | 
| multimegawatts | multimolecular | 
| multimillennial | |
Note: These 13 words that start with 'multim' are found from the USA & Canada version of the tournament Scrabble word list.