There are 12 words that start with 'inos'.
| inosine | inosite | 
| inosines | inosites | 
| inositol | inositols | 
| inosculate | inosculated | 
| inosculates | inosculating | 
| inosculation | inosculations | 
Note: These 12 words that start with 'inos' are found from the USA & Canada version of the tournament Scrabble word list.