n.: still less, much [still] less, the rather that [because], for the vantage, let alone, what is more
v.: say nothing of, much less (as in "X is no good, "much less" Y."), not to mention (as in "He is more than a match for you, "not to mention" his strong brother who is ready to help him."), much less (as in "X is no good, "much less" Y."), not to mention (as in "He is more than a match for you, "not to mention" his strong brother who is ready to help him.")