1) Allergic 2) Hypersensitised 3) Hypersensitized 4) Sensitised 5) Sensitized 6) Supersensitised 7) Supersensitive 8) Supersensitized 9) Susceptible 1) Hypersensitised 2) Hypersensitized 3) Sensitised 4) Sensitized 5) Supersensitised 6) Supersensitive 7) Supersensitized 8) Susceptible 
The state of being abnormally sensitive. It often refers to an extreme reaction to a pathogen (e.g., the formation of local lesions by a virus or the necrotic response of a leaf to bacterial infection). 
Usually used to characterise a host whose initial reactions to infection are so strong as to limit further development of the invading parasite.
hypersensitive (high' pur SEN suh tiv) 1. Excessively or abnormally sensitive; fragile. 2. Unusually susceptible to drugs, diseases, etc.
excessively sensitive: to be hypersensitive to criticism. · allergic to a substance to which persons do not normally react.