1) Caged 2) Closely confined 3) Confined 4) Cooped 5) Cooped up 6) Expensive house attachment 7) Fancy house opening 8) Fenced in 9) Front of a house 10) Held in 11) House on high 12) House opener 13) House opening 14) House preceder 15) Immured 16) Kept in 17) Shut in 18) Shut up 19) Under confinement Found on https://www.crosswordclues.com/clue/pent
Pent past participle or adjective [ From Pen , transitive verb ] Penned or shut up; confined; -- often with up . « Here in the body pent .» J. Montgomery. « No pent-up Utica contracts your powers.» J. M. Sewall... Found on http://www.encyclo.co.uk/webster/P/48