To boot
Definition 1 of 1
Pro Tip 1/3Extra Bonus
Use 'to boot' to highlight something additional, like an unexpected bonus or advantage. 
He's an excellent writer and punctual to boot.
Pro Tip 2/3Conversational Tone
The phrase is informal, best used in casual conversations rather than formal writing. 
She's a great singer, and she plays the guitar to boot.
Pro Tip 3/3Emphasize Positives
'To boot' often emphasizes positive qualities or benefits, adding to the listener's impression. 
The car is fast, with great mileage to boot.