Iris and Midriff

Iris noun - Muscular diaphragm that controls the size of the pupil which in turn controls the amount of light that enters the eye; it forms the colored portion of the eye.

Midriff and iris are semantically related. In some cases you can use "Midriff" instead a noun "Iris".

Midriff noun - The middle region of the human torso.

Iris and midriff are semantically related. Sometimes you can use "Iris" instead a noun "Midriff".