1) Bent over backward 2) Bowed 3) Colosseum entrance 4) Construction 5) Curved 6) Eyebrow-shaped 7) Forming or resembling an arch 8) Having a curved doorway 9) Having the form of an arch 10) Like a curious eyebrow 11) Like a gateway, often 12) Like a vault 13) Like an insole 14) Like an ogive 15) Like an upraised eyebrow Found on https://www.crosswordclues.com/clue/arched
made, covered, or spanned with an arch or arches. · having the form of an arch. · noting an ordinary or partition line formed as a slight curve. Found on https://www.infoplease.com/dictionary/arched