A free program for Android, by movinApp.
Offline English Synonyms Dictionary is an English-to-English and English-to-Spanish dictionary app that helps you learn new words in the most effective way possible, by analyzing their synonyms, phonetic spelling, and spelling. The dictionary is fully offline, which means that it does not need any internet connection to work.
This app is based on the idea that everyone has a unique way of learning and that learning should be fun. In addition, it does not require any registration to use it.
To use this app, you will first need to install it. You can do this from the Google Play store.
After installing it, you will be able to find all the words that you want to know in this dictionary.