Decomposing rhymes with:
composing, composing, composing, imposing, reimposing, composing, disposing, exposing, imposing, juxtaposing, opposing, overexposing, posing, predisposing, proposing, reimposing, supposing
composing, composing, composing, imposing, reimposing, composing, disposing, exposing, imposing, juxtaposing, opposing, overexposing, posing, predisposing, proposing, reimposing, supposing