Related words also have '+' and '-' buttons to be more or less specific.

You can also use the back and forward buttons. To see the definition for one of the related words double-click on the word. Browsing around related words is simple: click on the tabs for synonyms, antonyms, parts, part of, types, type of, similar, see also, and anagrams. To look at a particular sense you can click on the sense number. If you are looking for a particular part of speech you can click on the Noun, Verb, Adjective or Adverb buttons to show only the relevant synonyms and related words. Look up using Ctrl+Right click on a word in almost any program. WordWeb has the option to highlight widely used synonyms, great for helping you write clear easy-to-understand English. If you are editing a document you can select a synonym and replace the look-up word. The hotkey can be customized, or you can use a keyboard shortcut if you prefer. If you are online, with one extra click you can also search web references, for example Wikipedia. WordWeb Pro can look up words in virtually any program with just one click: just hold down the Ctrl key and right-click on the word.

For apple instal WordWeb Pro 10.34