transfer (trains, buses, etc.); change; switch (to another ideology, party, system, method, etc.); change; switching (stock); chromosomal crossover
replacement; substitution; change; shunting (rail); switching
exchange; conversion; replacement; switching (to); switchover
buying a replacement; replacing by buying something new
rearrangement (of classes); recomposition; recombination; reclassification
one after another; one after the other; in rotation; exchanging one after the other; changing repeatedly
changing the water (e.g. in a fish tank); well cleaning
conversion; refunding; renewal
rearrangement (of classes); recomposition; recombination; reclassification
exchange; conversion; replacement; switching (to); switchover