1. Heartily friendly and congenial
   - hail-fellow, hail-fellow-well-met

See also: comrade, comradeliness, friendly

• auteur
• authentic
• authentically
• authenticate
• authenticated
• authentication
• authenticator
• authenticity
• authigenic
• author
• author's name
• authoress
• authorial
• authoring language
• authorisation
• authorise
• authorised
• Authorised Version
• authoriser
• authoritarian
• authoritarian regime
• authoritarian state
• authoritarianism
• authoritative
• authoritatively