As adjectives the difference between bateless and dateless
is that bateless is (obsolete) not to be abated while dateless is out of one's head; deranged or dateless can be without a date imprinted, assigned, or associated.
As adjectives the difference between bateless and rateless
is that bateless is (obsolete) not to be abated while rateless is (mathematics) describing a family of codes whose higher rate codes have codewords that are prefixes of those of the lower rate codes.