There are 12 5-letter words that start with 'mer'.
| merch | mercs | mercy | merde | merer | 
| meres | merge | merit | merks | merle | 
| merls | merry | |||
Note: These 12 5-letter words that start with 'mer' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with merc, meri, merr, merg, mero, merl, mere, merm, merb, merd, merk.
4-letter words start with 'mer' (4)