possibly

• A branch of the Roman road, Ryknield Street, commonly called Buckle Street, leaving the former near Bidford-on-Avon and running over the Cotswolds via Weston Subedge, was known in former times as Buggilde or Buggeld Street, derived possibly from the Latin buculus , a young bullock. —  Grain and Chaff from an English Manor
• It was possibly, therefore, through this connexion that Pope owed his first introduction to the literary circles of London. —  The Project Gutenberg eBook of Alexander Pope, by Leslie Stephen.
• And now Ham is bragging around in a way that'll make you sick They were in a part of the city where nobody paid much attention to his neighbors--possibly because looking around at the neighbors would make anybody ashamed. —  079 - Poison Island
• They were probably one of the consequences of his solitary mode of life or, possibly, a contributing cause of it 6NINETEEN Tesla's mind always seemed to be under an explosive pressure. —  Prodigal genius - Tesla Biography
• When I flew south to start a vacation, he thought I was headed for Cristobal, hence the attempt to kill me B. A. ARTHUR stood up--possibly from habit acquired in addressing corporation meetings--to do his speaking Possibly," he said thoughtfully, "we should have gone to you in the first place. —  082 - The Dagger In The Sky

Allen's Synonyms and Antonyms