That has or have a slope.

simple past tense and past participle of slope

An area of ground that tends evenly upward or downward. / The degree to which a surface tends upward or downward.

(obsolete) slopingly

(obsolete) Sloping.

(intransitive) To tend steadily upward or downward. / (transitive) To form with a slope; to give an oblique or slanting direction to; to incline or slant.

plural of slope

Third-person singular simple present indicative form of slope

State of being slope.

Having a slope.