Loins and Thigh

Loins noun - The lower part of the abdomen just above the external genital organs.

Thigh and loins are semantically related in upper legs topic. In some cases you can use "Thigh" instead a noun "Loins", when it comes to topics like haunch of an animate being.

Thigh noun - The part of the leg between the hip and the knee.

Loins and thigh are semantically related in leg part topic. Sometimes you can use "Loins" instead a noun "Thigh".