dictionary

sanakirja A reference work with a list of words from one or more languages, normally ordered alphabetically, explaining each word's meaning, and sometimes containing information on its etymology, pronunciation, usage, translations, and other data.
(quote-book)
By extension, any work that has a list of material organized alphabetically; e.g., biographical dictionary, encyclopedic dictionary.
puhekieltä An associative array, a data structure where each value is referenced by a particular key, analogous to words and definitions in a physical dictionary.