There are 12 13-letter words that start with 'mel'.
| melancholiacs | melanizations | 
| melanogeneses | melanogenesis | 
| mellifluently | mellifluously | 
| melodiousness | melodramatics | 
| melodramatise | melodramatist | 
| melodramatize | meltabilities | 
Note: These 12 13-letter words that start with 'mel' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with mela, melo, meli, mell, melt, meld, mele, melp, mels.
4-letter words start with 'mel' (4)