i Register
In some senses, allergy is marked as figuratively, informal. Watch for register when choosing this word.
ADJ
food
VERB + ALLERGY
have, suffer from | develop
cause
Eating peanuts causes my brother's allergy to flare up every time.
ALLERGY + NOUN
sufferer
PREP
~ to
My daughter has an allergy to shellfish, so we always check restaurant menus carefully.