A cliche is a catchy phrase such as “eight days a week” or “damned if you do, damned if you don’t”.

Euphemism(without a second “i”) is the substitution of an agreeable or inoffensive expression for one that may offend or suggest something unpleasant to the listener; or in the case of doublespeak, to make it less troublesome for the speaker

lame → crippled → handicapped → disabled → differently abled

A euphemisim is to use a subtle word or phrase, versus one more direct.

Where as Euphemism is a less directed word that is used instead of a harsh or blunt word when referring to something unpleasent or embarrassing.

An euphemism is a way of saying something to make it sound less harsh than the term usually used. (exp: usual term–old people / euphenism–senior citizens) The dictionary says “The substitution of an inoffensive term for one considered offensively explicit.”