What is it called when a series of words start with the same letter?

What is it called when a series of words start with the same letter?

Alliteration is a term to describe a literary device in which a series of words begin with the same consonant sound. A classic example is: "She sells seashells by the sea-shore." Alliteration is meant to be more than a tongue twister, though.

What is it called when you mix letters up?

Spoonerism. A 'spoonerism' is when a speaker accidentally mixes up the initial sounds or letters of two words in a phrase. The result is usually humorous.

What is it called when words rhyme?

It's called 'assonance' meaning 'sounds the same'. As you note, words do not need to be spelled the same in order to sound the same. 'Sounds the same' is what assonance means.

What is it called when a word has double letters?

In most English language cases, they are simply a plural form of 4 double letter words, like weeks or tools. A lot of them are a different tense form of a four letter double letter word, such as called, beeped, fooled, seemed, and weeded.