The term 'adulterated less' can be defined as something that has been made less pure or genuine. The crossword solutions for this term are 'purer' (5 letters) and 'SHAM' (4 letters). Purer is an adjective meaning having a higher degree of purity or genuineness, while SHAM is an adjective meaning not genuine or authentic. Therefore, the crossword solutions for 'adulterated less' refer to something that has been made less pure or genuine, and is not authentic.