The term 'more concentrated' can be described by two crossword solutions: 'denser' (6 letters) and 'ENRICHED' (8 letters). Denser refers to a substance that has been made more compact, with the same mass occupying a smaller volume. ENRICHED, on the other hand, means that something has been increased in value or quality by adding something to it. Both terms can be used to describe a substance that has been made more concentrated.