What's this word (English language related)

[ColdemortReturns]

When you have a common saying where both words mean the same thing. Such as 'cease and desist'.
Theres a word for it. Please help, it's driving me batty and google isn't helping!

tautology

www.dictionary.com/browse/tautology

[quote CaptainMyCaptain]tautology

www.dictionary.com/browse/tautology[/quote]
No, I dont quite mean tautology. It's a specific word describing a 3 word phrase where it's a repetition.
Now any others examples have fled my mind too

Legal doublet?

Or just doublet

Never heard of it but @ladyvimes is right:

en.wikipedia.org/wiki/Legal_doublet

@ladyvimes

Legal doublet?

I was just looking at that, although I dont think all my examples are legal terminology. Although the only other one i can think of at the moment is 'null and void' so maybe...

synonym?

It's very much a thing in British English, like bits and pieces, hot and bothered, spic and span.

It's not a simple tautology, because it involves the use of the exact same pair of words in the exact same order.

Collocation. It's a type of fixed expression.
You can't have "cease and stop" or "girls and gentlemen".

Probably not, sorry, I missed the 'three word phrase' bit

A redundant expression?
Although that isn’t a “three word phrase” that you asked about as doesn’t necessarily include an “and” but things like:
“Final outcome”
“Advance warning”
“Free gift”
“New beginning”

The expression 'cease and desist' actually demands two slightly separate actions: the imperative verb 'cease' demands that X is immediately halted. The second imperative 'desist' requests that X is not restarted at any time. In layman's terms it means 'stop doing X, and don't do X in the future'. Therefore although the meanings are very similar they aren't identical.

I might mean pleonasm. But that's not quite right either...

Binomial expression, Google tells me.