traceable.

attribute, v. ascribe, impute, assign, refer, trace.

attribute, n. characteristic, peculiarity, predicate; symbol.

at variance. bickering, contending, at loggerheads, dissenting.

auction, n. vendue.

audacious, a. presumptuous, impudent, insolent, brazen, unabashed.
See bold.

augur, v. portend, forebode, presage, indicate, betoken.

augury, n. divination, prophecy; omen, portent, auspice, sign.

august a. majestic, sublime, imposing, impressive, grand, pompous.

auspices, n. pl. protection, favor, guidance, patronage, charge.

auspicious, a. propitious. Antonym: inauspicious.

Austrian Parliament. Reichsrath.

authentic, a. genuine, trustworthy, authoritative, credible.

authenticate, v. verify, attest, confirm.

authentication, n. verification, attestation, confirmation.