1. Invulnerable to fear or intimidation
   - audacious, brave, dauntless, fearless, hardy, intrepid

See also: bold

• Arundinaria tecta
• Arundo
• Arundo conspicua
• Arundo donax
• Arundo richardii
• Aruru
• aruspex
• Arvicola
• Arvicola amphibius
• arvo
• arXiv
• Aryan
• aryl
• arytaenoid
• arytenoid
• arytenoid cartilage
• arête
• as
• as a formality
• as a group
• as a matter of fact
• as far as possible
• as follows
• as if
• as if by magic