Final answer:
A direct comparison between unlike things without using like or as is called a metaphor.
Step-by-step explanation:
A direct comparison between two unlike things, without using like or as, is called a metaphor. In a metaphor, one thing is described as being another thing, adding depth and meaning to the comparison. For example, saying 'Her voice is velvet' is a metaphor because it equates the quality of her voice to the smoothness of velvet.
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