What's the noun for springiest? Here's the word you're looking for.
spring
A leap; a bound; a jump.
(countable) Traditionally the first of the four seasons of the year in temperate regions, in which plants spring from the ground and trees come into blossom, following winter and preceding summer.
(countable)Meteorologically, the months of March, April and May in the northern hemisphere or September, October and November in the southern.
(countable) The astronomically delineated period from the moment of vernal equinox, approximately March 21 in the northern hemisphere to the moment of the summer solstice, approximately June 21. (See Spring (season) on Wikipedia.Wikipedia for other variations.)
(countable)Spring tide; a tide of greater-than-average range, that is, around the first or third quarter of a lunar month, or around the times of the new or full moon.
(countable) A place where water emerges from the ground.
(uncountable) The property of a body of springing to its original form after being compressed, stretched, etc.
A shoot; a plant; a young tree; also, a grove of trees; woodland.
(obsolete) That which causes one to spring; specifically, a lively tune.
The time of growth and progress; early portion; first stage.
(countable, nautical) A rope attaching the bow of a vessel to the stern-side of the jetty, or vice versa, to stop the vessel from surging.
(nautical) A line led from a vessel's quarter to her cable so that by tightening or slacking it she can be made to lie in any desired position; a line led diagonally from the bow or stern of a vessel to some point upon the wharf to which she is moored.
(nautical) A crack or fissure in a mast or yard, running obliquely or transversely.