mum

As a noun book

is book.

As a proper noun mum is

one's mother.

As a proper noun mum

is one's mother.

As an adjective stupid is

lacking in intelligence or exhibiting the quality of having been done by someone lacking in intelligence.

As an adverb stupid is

(slang|dated) extremely.

As a noun stupid is

a stupid person; a fool.

As proper nouns the difference between mum and candy

is that mum is one's mother while candy is a pet form of the female given name candace or candice.

As proper nouns the difference between mum and mum

is that mum is one's mother while mum is one's mother.

As a proper noun mum

is one's mother.

As a noun bilateralism is

having a matching arrangement on each of two sides.

As adjectives the difference between noncommittal and mum

is that noncommittal is tending to avoid commitment; lacking certainty or decisiveness; reluctant to give out information or show one's feelings or opinion while mum is silent.

As a noun mum is

mother.

As an interjection mum is

stop speaking! hush.

As a verb mum is

to act in a pantomime or dumb show.

As a proper noun Mum is

one's mother.

Mum is a synonym of closemouthed.

As a proper noun mum

is one's mother.

As an adjective closemouthed is

reticent, secretive or uncommunicative.

Tentative is a related term of mum.

As a noun tentative

is a trial; an experiment.

As an adjective tentative

is of or pertaining to a trial or trials; essaying; experimental.

As a proper noun mum is

one's mother.

Cautious is a related term of mum.

As an adjective cautious

is careful; using or exercising caution; tentative.

As a proper noun mum is

one's mother.

Indefinite is a related term of mum.

As an adjective indefinite

is without limit; forever, or until further notice; not definite.

As a proper noun mum is

one's mother.