haste (part of speech: noun)
speed (part of speech: noun)
- The main traveller began to creep toward the towers with relative rapidity. - "Out of the Primitive", Robert Ames Bennet.
- None realized the rapidity of its advance. - "Barriers Burned Away", E. P. Roe.
- Both quantity of goods and quantity of money are commonly defined as actual quantity multiplied by " rapidity of circulation." - "The Value of Money", Benjamin M. Anderson, Jr..