challenging

As an initialism try

is .

As a verb challenging is

.

As an adjective challenging is

difficult, hard to do.

As a noun challenging is

the act of making a challenge.

As verbs the difference between breaking and challenging

is that breaking is present participle of lang=en while challenging is present participle of lang=en.

As nouns the difference between breaking and challenging

is that breaking is the act by which something is broken while challenging is the act of making a challenge.

As an adjective challenging is

difficult, hard to do.

As adjectives the difference between conventional and challenging

is that conventional is pertaining to a convention, as in following generally accepted principles, methods and behaviour while challenging is difficult, hard to do.

As nouns the difference between conventional and challenging

is that conventional is (finance) a conventional gilt-edged security, a kind of bond paying the holder a fixed cash payment (or coupon) every six months until maturity, at which point the holder receives the final payment and the return of the principal while challenging is the act of making a challenge.

As a verb challenging is

.

As a verb challenging

is present participle of lang=en.

As an adjective challenging

is difficult, hard to do.

As a noun challenging

is the act of making a challenge.

As an adverb challengingly is

in a way or to an extent that challenges.

As adjectives the difference between friendly and challenging

is that friendly is generally warm, approachable and easy to relate with in character while challenging is difficult, hard to do.

As nouns the difference between friendly and challenging

is that friendly is (sports) a game which is of no consequence in terms of ranking, betting etc while challenging is the act of making a challenge.

As an adverb friendly

is in a friendly manner, like a friend.

As a verb challenging is

.

As nouns the difference between questioning and challenging

is that questioning is the action of asking questions; a survey; an inquiry while challenging is the act of making a challenge.

As adjectives the difference between questioning and challenging

is that questioning is characterized by questions, inquisitiveness, doubt or wonder while challenging is difficult, hard to do.

As verbs the difference between questioning and challenging

is that questioning is present participle of lang=en while challenging is present participle of lang=en.

As verbs the difference between banning and challenging

is that banning is while challenging is .

As nouns the difference between banning and challenging

is that banning is the act by which something is banned; a prohibition while challenging is the act of making a challenge.

As an adjective challenging is

difficult, hard to do.

As verbs the difference between challenging and null

is that challenging is present participle of lang=en while null is to nullify; to annul.

As adjectives the difference between challenging and null

is that challenging is difficult, hard to do while null is having no validity, "null and void.

As nouns the difference between challenging and null

is that challenging is the act of making a challenge while null is a non-existent or empty value or set of values.

As verbs the difference between challenging and rewarding

is that challenging is present participle of lang=en while rewarding is present participle of lang=en.

As adjectives the difference between challenging and rewarding

is that challenging is difficult, hard to do while rewarding is giving reward or satisfaction.

As a noun challenging

is the act of making a challenge.

As adjectives the difference between formidable and challenging

is that formidable is causing fear, dread, awe or admiration as a result of size, strength, or some other impressive quality; commanding respect; causing wonder or astonishment while challenging is difficult, hard to do.

As a verb challenging is

.

As a noun challenging is

the act of making a challenge.