There are 10 words that start with 'microi'.
| microinch | microimage | 
| microimages | microinches | 
| microinject | microinjects | 
| microinjected | microinjecting | 
| microinjection | microinjections | 
Note: These 10 words that start with 'microi' are found from the USA & Canada version of the tournament Scrabble word list.