There are 4 7-letter words that start with 'micr'.
micrify | microbe | microhm | microns |
Note: These 4 7-letter words that start with 'micr' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with micro, micri, micru, micra.
5-letter words start with 'micr' (2)