When correcting or clarifying:
In fact
In reality
In truth
As a matter of fact
When adding emphasis:
Truly
Indeed
Genuinely
For a direct replacement:
Really
Precisely
Absolutely
When correcting or clarifying:
In fact
In reality
In truth
As a matter of fact
When adding emphasis:
Truly
Indeed
Genuinely
For a direct replacement:
Really
Precisely
Absolutely