The term 'in a big way' can be expressed in many different ways. The crossword solutions for this term include HUGELY (6 letters), GREATLY (7 letters), vastly (6 letters), likemad (7 letters), majorly (7 letters), obesly (7 letters), and massively (9 letters). All of these words are adverbs that describe something being done to a great degree or extent. They all imply that something is being done in an extreme or exaggerated manner.