"rate" - key terms from Wikipedia

auction rate	securities
birth rate
bit rate
bus clock rate
clock rate
crime rate
cure rate
data rate
death rate
discount rate
error rate
exchange rate
failure rate
federal funds rate
fertility rate
fixed exchange rate
fixed rate
floating rate
flow rate
frame rate
growth rate
heart rate
inflation rate
interest rate
interest rate	swaps
internal rate	of return
lapse rate
literacy rate
marginal rate
marginal tax rate
mass flow rate
metabolic rate
mortality rate
nominal interest rate
penetration rate
rate
rate	constant
rate	of fire
rate	of return
reaction rate
real interest rate
refresh rate
royalty rate
sales tax rate
sampling rate
survival rate
tax rate
transfer rate
twist rate
unemployment rate