Diaper rash and Dermatitis

Diaper rash noun - Dermatitis of the thighs and buttocks of infants; supposedly caused by ammonia in the urine in the child's diapers.

Dermatitis and diaper rash are semantically related. In some cases you can use "Dermatitis" instead a noun phrase "Diaper rash".

Dermatitis noun - Inflammation of the skin; skin becomes itchy and may develop blisters.

Diaper rash and dermatitis are semantically related. Sometimes you can replace phrase "Diaper rash" with "Dermatitis", this terms are similar.