"matching" - key terms from Wikipedia

approximate matching
bipartite matching
block matching
color matching
color matching	functions
conjugate matching
histogram matching
impedance matching
matching
matching	at least
matching	cards
matching	contributions
matching	funds
matching	headstock
matching	hypothesis
matching	law
matching	mole
matching	pennies
matching	polynomial
matching	principle
matching	pursuit
matching	rules
matching	service
matching	system
matching	theory
matching	tiles
maximal matching
maximum matching
moment matching
pattern matching
perfect matching
phase matching
string matching
template matching