The term 'bare minimum' is used to refer to the LEAST amount of something that is necessary or acceptable. The two crossword solutions for this term are 'LEAST' (5 letters) and 'noless' (6 letters). 'LEAST' is an adjective meaning the smallest in size, amount, or degree. 'Noless' is an adverb meaning not any less than a certain amount. Together, these two words can be used to describe the concept of the bare minimum.