slope vs tilt

slope

verb
  • To form with a slope; to give an oblique or slanting direction to; to incline or slant. 

  • To try to move surreptitiously. 

  • To tend steadily upward or downward. 

  • To hold a rifle at a slope with forearm perpendicular to the body in front holding the butt, the rifle resting on the shoulder. 

noun
  • The slope of the line tangent to a curve at a given point. 

  • An area of ground that tends evenly upward or downward. 

  • A person of Chinese or other East Asian descent. 

  • The angle a roof surface makes with the horizontal, expressed as a ratio of the units of vertical rise to the units of horizontal length (sometimes referred to as run). 

  • The ratio of the vertical and horizontal distances between two points on a line; zero if the line is horizontal, undefined if it is vertical. 

  • The degree to which a surface tends upward or downward. 

tilt

verb
  • To slope or incline (something); to slant. 

  • To point or thrust (a weapon). 

  • To intentionally let the ball fall down to the drain by disabling flippers and most targets, done as a punishment to the player when the machine is nudged too violently or frequently. 

  • To play worse than usual (often as a result of previous bad luck or losses). 

  • To charge (at someone) with a lance. 

  • To forge (something) with a tilt hammer. 

  • To be at an angle. 

  • To point or thrust a weapon at. 

  • To cover with a tilt, or awning. 

noun
  • An attempt at something, such as a tilt at public office. 

  • A jousting contest. (countable) 

  • A canvas covering for carts, boats, etc. 

  • Any covering overhead; especially, a tent. 

  • The controlled vertical movement of a camera, or a device to achieve this. 

  • A thrust, as with a lance. 

  • A tilt hammer. 

  • A slope or inclination. 

  • The inclination of part of the body, such as backbone, pelvis, head, etc. 

How often have the words slope and tilt occurred in a corpus of books? (source: Google Ngram Viewer )