Crosswords strengthens the vocabulary and spelling of students and adults alike . A larger vocabulary , in turn , can increase your processing speed and your abstract thinking . This kind of mental boost can lead to greater professional success , as well . ▪︎"Crossword puzzles help human brain function " ▪︎Crosswords delay memory loss and help alleviate dementia ▪︎ Crosswords preserve memory , cognitive function and overall brain strength