WordNet sense 1 ((chemistry) a reaction in which an elementary substance displaces and sets free a constituent element from a compound):

displacement reaction

WordNet sense 2 (an event in which something is displaced without rotation):

shift

WordNet sense 3 (the act of uniform movement):

translation

WordNet sense 4 (to move something from its natural environment):

deracination

WordNet sense 5 (act of taking the place of another especially using underhanded tactics):

supplanting