A free program for Android, by MobiSystems.
This is the first mobile version of Collins Thesaurus of the English Language, and it will be your best tool to learn, write and speak English. It’s a unique and complete dictionary that includes hundreds of thousands of words, all in one place. The latest words in the dictionary are based on the latest English language data from the Oxford English Corpus.
You can search the English language by using any of the four categories (people, places, things, and activities). If you want to search for a specific word, you can use the keyword function and search by spelling or phonetic spelling. You can also search by parts of speech: verb, adjective, noun, adverb, etc.
Once you have found the word you want, you can see all the synonyms and antonyms, an example, and a translation. This is very helpful because it gives you the context of the word you are looking for.
The dictionary also includes a tool that helps you find the right word in a pinch. It’s called the Quick Finder.