I recently started looking at completions, and it says in the help if I am in insert mode and press CTRL+X CTRL+T I should be able to bring up a thesaurus of other words in a drop-down completion, but it just says thesaurus option is empty. How do I set my thesaurus option, and can I do the same thing for the dictionary?
Thesaurus Option is empty?
autocompletion
it just says thesaurus option is empty. To use the thesaurus in vim, option thesaurus has to be defined in .vimrc, pointing to the location of the thesaurus text file. Use set thesaurus+=<file>.txt   * Replace <file> with the file location You can define your own thesaurus using Steps :  touch thesaurus.txtwrite important,valuable,substantial,significant inside it and :wq link to the file in .vimrc using set thesaurus+=/home/thesaurus.txtenjoy your newly created thesaurus using Ctrl+x Ctrl+t But...but...Making thesaurus for every word is so laborious which is why you can download a thesaurus like Moby thesaurus which has about 20 synonyms for every word! Alternate link to moby word.txtlink it to .vimrc and enjoy