Mother vs Mum

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

Mother

High-frequency chunk A1 noun

Mum

Informal Top 1,000 (very common) A1 noun

Most formal: Mother

	Mother	Mum
Pronunciation	🇬🇧 /["/ˈmʌðə(r)/"]/ 🇺🇸 /["/ˈmʌðər/"]/	🇬🇧 /["/mʌm/"]/ 🇺🇸 /["/mʌm/"]/
Meaning	A female parent.	A word for mother.
Example	My mother makes the best cookies in the world.	Mum is making dinner for the whole family.
Register	Neutral	Informal
How common	High-frequency chunk	Top 1,000 (very common)
CEFR level	A1	A1
Part of speech	noun	noun
Collocations	lone, single, unmarried, resemble, take after, inherit something from	young, single, unmarried, mum and dad
Antonyms	father, child	dad, father
Common mistakes	Confused with 'mom' in formal contexts., Using 'mother' when 'mothers' (plural) is needed., Mispronouncing 'mother' as 'mutha' in formal settings.	Confused with 'mom', which is American English., Used in formal contexts where 'mother' is preferred., Mispronounced as 'muhm' instead of 'mum'.
Usage notes	Use 'mother' to refer to a female parent in most contexts. Avoid using it in overly casual situations as it can sound overly familiar when addressing someone not related to you.	Used primarily in British and Australian English. More casual than 'mother'. Not appropriate in formal writing or speech.

See it in real clips

How I Met Your Mother › S1 E1

The story of how I met your mother.

Game Of Thrones › S1 E1

And your mother.

House Of Dragons › S1 E1

- Leaves people wanting for cups. - I was visiting mother.

How I Met Your Mother › S1 E1

The story of how I met your mother.

Game Of Thrones › S1 E1

And your mother.

Mother

Frequently asked questions: Mother vs Mum

What's the difference between Mother and Mum?

Mother: A female parent. Mum: A word for mother.

Which is more formal: Mother and Mum?

Mother is the most formal of these.

Are Mother and Mum the same CEFR level?

Mother: A1, Mum: A1 on the CEFR scale.

What part of speech are Mother and Mum?

Mother: noun, Mum: noun.

Can you show an example of each?

Mother: My mother makes the best cookies in the world. Mum: Mum is making dinner for the whole family.

Can I use Mother and Mum interchangeably?

Not always. Mother and Mum 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.