Os·si·ning 
(ŏsĭ-nĭng) Formerly Sing Sing (sĭng sĭng′)
(ŏsĭ-nĭng) Formerly Sing Sing (sĭng sĭng′) A village of southeast New York north of New York City on the Hudson River. It is the site of Sing Sing Correctional Facility, a maximum security prison founded in 1825.
- unflapped
- unflattering
- unflatteringly
- unfledged
- unflinching
- unflinchingly
- unflinchingness
- unfocused
- unfocussed
- unfold
- unfoldment
- unforeseen
- unforgettability
- unforgettable
- unforgettableness
- unforgettably
- unforgivable
- unforgiving
- unformatted
- unformed
- unfortunate
- unfortunately
- unfounded
- unfoundedly
- unfoundedness