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detritivore vs. decomposer

[dih-trahy-tuh-vawr, -vohr] / dɪˈtraɪ təˌvɔr, -ˌvoʊr /

noun

Ecology.
  1. an organism that uses organic waste as a food source, as certain insects.

[dee-kuhm-poh-zer] / ˌdi kəmˈpoʊ zər /

noun

  1. a person or thing that decomposes.

  2. Ecology. an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances.