at least vs leastwise

at least and leastwise both are adverbs.

Word	Noun	Adjective	Verb	Adverb
at least	No	No	No	Yes
leastwise	No	No	No	Yes

As adverbs, at least and leastwise are synonyms defined as:

at least and leastwise: if nothing else (`leastwise' is informal and `leastways' is colloquial)

Other synonyms of at least include at any rate, leastways.

at least (adverb)	leastwise (adverb)
not less than	if nothing else (`leastwise' is informal and `leastways' is colloquial)
if nothing else (`leastwise' is informal and `leastways' is colloquial)