diligent

As an adjective diligent

is performing with intense concentration, focus, responsible regard.

As a noun persistence is

the property of being persistent.

As adjectives the difference between diligent and obedient

is that diligent is performing with intense concentration, focus, responsible regard while obedient is willing to comply with the commands, orders, or instructions of those in authority.

As adjectives the difference between diligent and null

is that diligent is performing with intense concentration, focus, responsible regard while null is having no validity, "null and void.

As a noun null is

a non-existent or empty value or set of values.

As a verb null is

to nullify; to annul.

As adjectives the difference between diligent and sharp

is that diligent is performing with intense concentration, focus, responsible regard while sharp is able to cut easily.

As an adverb sharp is

to a point or edge; piercingly; eagerly; sharply.

As a noun sharp is

the symbol ♯, placed after the name of a note in the key signature or before a note on the staff to indicate that the note is to be played a semitone higher.

As a verb sharp is

to raise the pitch of a note half a step making a natural note a sharp.

As a proper noun Sharp is

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As adjectives the difference between inexhaustible and diligent

is that inexhaustible is impossible to exhaust; unlimited while diligent is performing with intense concentration, focus, responsible regard.

As adjectives the difference between businesslike and diligent

is that businesslike is methodical and efficient, in a way that would be advantageous to a business or businessperson while diligent is performing with intense concentration, focus, responsible regard.

As adjectives the difference between diligent and unintermitted

is that diligent is performing with intense concentration, focus, responsible regard while unintermitted is not intermitted; uninterrupted, ceaseless.

As adjectives the difference between sly and diligent

is that sly is artfully cunning; secretly mischievous; wily while diligent is performing with intense concentration, focus, responsible regard.

As an adverb sly

is slyly.

As adjectives the difference between diligent and trustworthy

is that diligent is performing with intense concentration, focus, responsible regard while trustworthy is deserving of trust, reliable.

As adjectives the difference between diligent and competent

is that diligent is performing with intense concentration, focus, responsible regard while competent is competent (able).