Atopic allergy and Allergy

Atopic allergy noun - An allergic reaction that becomes apparent in a sensitized person only minutes after contact.

Allergy and atopic allergy are semantically related. In some cases you can use "Allergy" instead a noun phrase "Atopic allergy".

Allergy noun - A strong feeling of not liking or approving.

Atopic allergy and allergy are semantically related. Sometimes you can replace phrase "Atopic allergy" with "Allergy", this terms are similar.