strenuous

As an adjective strenuous

is urgent, ardent, zealous.

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As adjectives the difference between rigorous and strenuous

is that rigorous is manifesting, exercising, or favoring rigour; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration while strenuous is urgent, ardent, zealous.

As adjectives the difference between strident and strenuous

is that strident is loud; shrill, piercing, high-pitched; rough-sounding while strenuous is urgent, ardent, zealous.

As a noun strident

is (linguistics) one of a class of s-like fricatives produced by an airstream directed at the upper teeth.

As adjectives the difference between strenuous and grueling

is that strenuous is urgent, ardent, zealous while grueling is .

As adjectives the difference between strenuous and backbreaking

is that strenuous is urgent, ardent, zealous while backbreaking is (figuratively) of work, very physically tiring.

As adjectives the difference between strenuous and tedious

is that strenuous is urgent, ardent, zealous while tedious is boring, monotonous, time consuming, wearisome.

As an adverb extremely

is (degree) to an extreme degree.

As an adjective strenuous is

urgent, ardent, zealous.

Powerful is a related term of strenuous.

As adjectives the difference between powerful and strenuous

is that powerful is having, or capable of exerting power, potency or influence while strenuous is urgent, ardent, zealous.

Stouthearted is a related term of strenuous.

As adjectives the difference between stouthearted and strenuous

is that stouthearted is brave, courageous and plucky while strenuous is urgent, ardent, zealous.

Manful is a related term of strenuous.

As adjectives the difference between manful and strenuous

is that manful is showing the characteristics considered typical of a man; macho or manly while strenuous is urgent, ardent, zealous.