friction

As a noun friction

is the rubbing of one object or surface against another.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As nouns the difference between attraction and friction

is that attraction is the tendency to attract while friction is the rubbing of one object or surface against another.

As nouns the difference between vibration and friction

is that vibration is vibration while friction is the rubbing of one object or surface against another.

As nouns the difference between fray and friction

is that fray is affray; broil; contest; combat; brawl; melee while friction is the rubbing of one object or surface against another.

As a verb fray

is to unravel; used particularly for the edge of something made of cloth, or the end of a rope.

As a noun friction

is the rubbing of one object or surface against another.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between friction and fretting

is that friction is the rubbing of one object or surface against another while fretting is action of the verb to fret.

As a verb fretting is

present participle of fret.

Friction is a related term of aversion.

As nouns the difference between friction and aversion

is that friction is the rubbing of one object or surface against another while aversion is aversion.

Division is a related term of friction.

As nouns the difference between division and friction

is that division is division while friction is the rubbing of one object or surface against another.

As nouns the difference between scrape and friction

is that scrape is a broad, shallow injury left by scraping (rather than a cut or a scratch) while friction is the rubbing of one object or surface against another.

As a verb scrape

is to draw an object, especially a sharp or angular one, along (something) while exerting pressure.

As nouns the difference between clutch and friction

is that clutch is the claw of a predatory animal or bird while friction is the rubbing of one object or surface against another.

As a verb clutch

is to seize, as though with claws.

As an adjective clutch

is performing or tending to perform well in difficult, high-pressure situations.