Difference between Backbone and Grit

Backbone

Part of speech: noun

Definition: set of bones which connected make up the spine and spinal column and run down the middle of the back in vertebrate animals. any fundamental support, structure, or infrastructure courage, fortitude, or strength

Example sentence: The drummer is the backbone of the band and is the real underrated one.

Grit

Part of speech: verb

Definition: To clench, particularly in reaction to pain or anger; apparently only appears in gritting one's teeth.To cover with grit.

Part of speech: noun

Definition: Collection of hard small materials, such as dirt, ground stone, debris from sandblasting or other such grinding, swarf from metalworking.Inedible particles in food.A character trait that means to have courage, fearlessness, or guts.Husked but unground oats.

Example sentence: Over time, grit is what separates fruitful lives from aimlessness.