As nouns the difference between wallet and mail
is that wallet
is a small case, often flat and often made of leather, for keeping money (especially paper money), credit cards, etc while mail
is or mail
can be (uncountable) armour consisting of metal rings or plates linked together or mail
can be (chiefly|scotland) a monetary payment or tribute.
As a verb mail is
to send (a letter, parcel, etc) through the mail or mail
can be to arm with mail.
As nouns the difference between buck and wallet
is that buck
is a male deer, antelope, sheep, goat, rabbit, hare, and sometimes the male of other animals such as the ferret and shad or buck
can be (scotland) the beech tree or buck
can be lye or suds in which cloth is soaked in the operation of bleaching, or in which clothes are washed while wallet
is a small case, often flat and often made of leather, for keeping money (especially paper money), credit cards, etc.
As a verb buck
is to copulate, as bucks and does or buck
can be to bend; buckle.