(n) autobahn (only used for German, etc. highways) (ger: Autobahn)
(n) outburst
(n) outback
(n) outflow
(n) output
(n) outline
(n) outrigger
(n) outlook
(n) outrage
(n) outlet (store that sells seconds, discontinued lines, etc.)
(P)
(n) outward
(n) outwards
(n) upbeat (ger: Auftakt)
anacrusis
(n) accurate
(n) accurate
(n) aquatint
(n) aquatron
(n) aquanaut
(n) aquavit
akvavit
(n) acquit
(n) aqueduct
(n) acquaint
(n) accident
(P)
(ik) (n) actress
(n) activation bit
(n,vs) accumulate
(vs) accredit
(n) (1) acrobat
(2) acrobatics
(P)
(n) achromat
(vs) aggravate