Decongestant rhymes with:
contestant, assistant, consistent, constant, contestant, distant, existent, extant, halperstant, inconsistent, insistent, instant, nonexistent, persistent, protestant, resistant, self-consistent
contestant, assistant, consistent, constant, contestant, distant, existent, extant, halperstant, inconsistent, insistent, instant, nonexistent, persistent, protestant, resistant, self-consistent