1. A method, comprising: operating a portable apparatus so as to: store at least one context sensitive dictionary having a plurality of first words therein, a subset of one or more of the first words being associated with one or more respective associated words and phrases, the or each respective associated word and phrase representing an instance of the first word with which it is associated; enable character input by a user of the portable apparatus; compare input characters when input with the first words in the at least one context sensitive dictionary; determine, in dependence on the comparison, one or more first words in the context sensitive dictionary corresponding, at least partially, to the input characters; select, in dependence on the determination, one or more associated words and phrases associated with the determined first words; and display the selected one or more associated words and phrases to the user as a substitution for the input characters.