Citric and boric (5)
I believe the answer is:
acids
(Other definitions for acids that I've seen before include "They react" , "Corrosive substances" , "They turn litmus paper red" , "They have a sour taste" , "they're sharp" .)
I believe the answer is:
acids
(Other definitions for acids that I've seen before include "They react" , "Corrosive substances" , "They turn litmus paper red" , "They have a sour taste" , "they're sharp" .)