Question

describing customization tools in word
match the tool to the task it helps to accomplish.
translate
smart lookup
thesaurus
allows the user to change words from one language to another
allows user to find the definition of a word or a phrase
allows the user to find the synonyms and antonyms of a word

Explanation:

Answer:

Thesaurus - allows the user to find the synonyms and antonyms of a word
Smart Lookup - allows user to find the definition of a word or a phrase
Translate - allows the user to change words from one language to another