"reduction" - key terms from Wikipedia

amount of gain reduction
beta reduction
carbon reduction
contrast reduction
cx noise reduction
dimensional reduction
disaster reduction
disaster risk reduction
dosage reduction
dose reduction
dust reduction	system
emission reduction
emissions reduction
gear reduction
harm reduction
immigration reduction
lithic reduction
noise reduction
noise reduction	rating
noise reduction	system
open reduction
orbit reduction
pipeline reduction
poverty reduction
poverty reduction	strategy
previous reduction
reduction
reduction	function
reduction	in seizure frequency
reduction	in shortfall
reduction	of the voting age
reduction	of wrinkles
reduction	potential
reduction	potentials
reduction	schemes
reduction	strategies
reduction	targets
relative risk reduction
risk reduction
row reduction
selective catalytic reduction
selective reduction
source reduction
standard reduction	potential
strategic arms reduction
tariff reduction
threat reduction
vowel reduction
waste reduction
weight reduction