Collection rhymes with:
recollection, predilection, recollection, selection, election, flexion, inflection, predilection, preelection, recollection, reelection, reflection, selection
Collection sounds like:
celestin, celestina, celestine, celestino, chalcedony, classaction, claxton, clewiston, clogston, closedown, clugston, collocation, colston, coulston, cyclostome