"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