Ridiculous use of words

One word substitute is Malapropism.

Onomatopoeia: the formation of a word from a sound associated with what is named.
Malapropism: the mistaken use of a word in place of a similar-sounding one, often with an amusing effect.
Neologism: a newly coined word or expression.
Pun: a joke exploiting the different possible meanings of a word or the fact that there are words which sound alike but have different meanings.