Open English Wordnet
Adverbs
(r)at least, leastways, leastwise, at any rateif nothing else (`leastwise' is informal and `leastways' is colloquial)“at least he survived”, “they felt--at any rate Jim felt--relieved though still wary”, “the influence of economists--or at any rate of economics--is far-reaching”
(r)at least, at the leastnot less than“at least two hours studying the manual”, “a tumor at least as big as an orange”