I'll tell you what else vs Moreover

When to use each in English, with meaning, register, and examples.

I'll tell you what else

Informal Top 5,000 (fairly common)

Moreover

Formal Top 3,000 (common) B2 adverb

Most formal: Moreover Most common: Moreover

	I'll tell you what else	Moreover
Pronunciation	🇬🇧 //aɪl tɛl jʊ wɒt ɛls// 🇺🇸 //aɪl tɛl jʊ wʌt ɛls//	🇬🇧 /["/mɔːrˈəʊvə(r)/"]/ 🇺🇸 /["/mɔːrˈəʊvər/"]/
Meaning	I will share more information.	Also; in addition to what was said.
Example	I'll tell you what else I found during my research.	A talented artist, he was, moreover, a writer of some note.
Register	Informal	Formal
How common	Top 5,000 (fairly common)	Top 3,000 (common)
CEFR level	-	B2
Part of speech		adverb
Collocations	tell you what else happened, tell you what else to consider, tell you what else we need	moreover, it is important, moreover, research shows, moreover, we can conclude
Antonyms	-	however, nevertheless, nonetheless
Common mistakes	Used too formally in business contexts., Confused with similar phrases like 'Additionally' or 'Moreover'.	'Moreover' used at the start of a sentence without proper context., Confusing 'moreover' with 'more then' — they have different meanings., Using 'moreover' in informal settings where simpler words would be better.
Usage notes	This phrase is often used in conversations to introduce an additional point or idea, making it suitable for casual settings. It may not be appropriate in formal written communication.	Use 'moreover' to add information in formal writing or speeches. It's not common in casual conversations. Alternatives like 'also' may feel more fitting in informal contexts.

See it in real clips

Sherlock › S1 E1

I'll tell you what else...

I'll tell you what else

Moreover, I feel heartfelt sorrow for the mother of Private James Ryan,

Moreover

Frequently asked questions: I'll tell you what else vs Moreover

What's the difference between I'll tell you what else and Moreover?

I'll tell you what else: I will share more information. Moreover: Also; in addition to what was said.

Which is more formal: I'll tell you what else and Moreover?

Moreover is the most formal of these.

Which is more common: I'll tell you what else and Moreover?

Moreover is the most common in everyday English.

Can you show an example of each?

I'll tell you what else: I'll tell you what else I found during my research. Moreover: A talented artist, he was, moreover, a writer of some note.

Can I use I'll tell you what else and Moreover interchangeably?

Not always. I'll tell you what else and Moreover are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.