brother, sworn
companion-in-arms, devoted friend
2H4 III.ii.310 [Falstaff alone, of Shallow] [he] talks as familiarly of John o'Gaunt as if he had been sworn brother to him
Cor II.iii.95 [Coriolanus to Fourth Citizen] I will ... flatter my sworn brother, the people, to earn a dearer estimation of them
H5 II.i.11 [Bardolph to Nym, of them and Pistol] we'll be all three sworn brothers to France
H5 III.ii.44 [Boy alone] Nym and Bardolph are sworn brothers in filching
MA I.i.67 [Beatrice to Leonato, of Benedick] He hath every month a new sworn brother
R2 V.i.20 [Richard to Queen Isabel] I am sworn brother ... / To grim Necessity