1. In addition, by way of addition; furthermore
   - additionally

Encyclopedia: To boot

• unrighteousness
• unrimed
• unrip
• unripe
• unripened
• unrivaled
• unrivalled
• unroll
• unromantic
• unromantically
• unroofed
• unrouged
• unrounded
• unruffled
• unruliness
• unruly
• unsaddle
• unsaddled
• unsafe
• unsafely
• unsaid
• unsalable
• unsalaried
• unsaleable
• unsalted