"functional" - key terms from Wikipedia

density functional
density functional	theory
energy functional
functional
functional	alternatives
functional	analysis
functional	calculus
functional	capacity
functional	dependencies
functional	dependency
functional	derivative
functional	dyspepsia
functional	earth
functional	equation
functional	form
functional	genomics
functional	grammar
functional	group
functional	groups
functional	illiteracy
functional	imaging
functional	impairments
functional	integral
functional	languages
functional	layer
functional	layout
functional	magnetic resonance imaging
functional	measure
functional	model iteration
functional	neuroimaging
functional	pitch recognition
functional	power
functional	profile
functional	programming
functional	programming language
functional	programming languages
functional	prototype
functional	psychology
functional	requirements
functional	role
functional	safety
functional	specification
functional	style
functional	units
hybrid functional
joint functional	component command
limited functional	support
linear functional
pure functional
purely functional