As a verb require

is (label) to ask (someone) for something; to request.

As an adjective undefined is

lacking a definition or value.

As a verb novel

is to increase (to make larger).

As an initialism fact is

federation against copyright theft.

As nouns the difference between conurbation and metropolitan

is that conurbation is a continuous aggregation of built-up urban communities created as a result of urban sprawl while metropolitan is (christianity) a bishop empowered to oversee other bishops; an archbishop.

As an adjective metropolitan is

(christianity) pertaining to the see or province of a metropolitan.

As nouns the difference between statement and review

is that statement is a declaration or remark while review is a second or subsequent reading of a text or artifact.

As verbs the difference between statement and review

is that statement is to provide an official document of a proposition, especially in the UK a Statement of Special Educational Needs while review is to survey; to look broadly over.

As nouns the difference between tension and retention

is that tension is condition of being held in a state between two or more forces, which are acting in opposition to each other while retention is the act of retaining or something retained.

As a verb tension

is to place an object in tension, to pull or place strain on.

As nouns the difference between mumble and muster

is that mumble is a quiet or unintelligible vocalization while muster is example.

As a verb mumble

is (intransitive) to speak unintelligibly or inaudibly; to fail to articulate.

As an adjective utter

is outer; furthest out, most remote.

As a verb utter

is to say.

As an adverb utter

is further out; further away, outside.

As a noun udder is

an organ formed of the mammary glands of female quadruped mammals, particularly ruminants such as cattle, goats, sheep and deer.

As verbs the difference between munch and muster

is that munch is to chew with a grinding, crunching sound—often used with on while muster is to show, exhibit.

As nouns the difference between munch and muster

is that munch is a location or restaurant where good eating can be expected while muster is gathering.

As verbs the difference between simpering and growling

is that simpering is while growling is .

As nouns the difference between simpering and growling

is that simpering is the act of one who simpers while growling is a sustained instance of growls or guttural noises.

As an adjective growling is

producing a growl.

As proper nouns the difference between jesus and luther

is that jesus is jesus while luther is (martin luther), german monk and theologian whose teaching inspired the reformation or luther can be (label).