The term 'good thing' can be broken down into five crossword solutions: PLUS (4 letters), BOON (4 letters), ASSET (5 letters), BEAUTY (6 letters), and ABUNDANCE (9 letters). PLUS is a Latin word meaning 'MORE' or 'ADDITIONAL'. A BOON is a blessing or benefit. An ASSET is something of value that can be owned or controlled to produce positive value. BEAUTY is a quality that pleases the senses or mind. Finally, ABUNDANCE is an ample or plentiful amount of something. All of these words can be used to describe a good thing.