1) Aslant 2) At a slant 3) At a slope 4) At an angle 5) Canted 6) Diagonal 7) Diagonally 8) Going downhill 9) Inclined 10) Like a ski hill 11) Not even 12) Not flat 13) Not fully vertical 14) Not level 15) Not on the level 16) Not straight up 17) Not vertical or horizontal 18) On the decline 19) Pitched 1) Aslant 2) Canted 3) Slanted 4) Slanting 5) Sloped 6) Sloping 
• (adv. & a.) Slopingly; aslant; declining from an upright direction; sloping.
A·slope' adverb & adjective [ Prefix a- + slope .] Slopingly; aslant; declining from an upright direction; sloping. 'Set them not upright, but aslope .' Bacon. 
at a slope; aslant; slantingly; diagonally.