rigorous

As an adjective 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.

As a proper noun gray is

; originally a nickname for someone with a gray beard or hair.

As an adjective 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.

As a noun stick is

(ireland) a member of the official ira.

As a proper noun stick is

(musici) the chapman stick, an electric musical instrument devised by emmett chapman.

Rigorous is a related term of sarcastic.

As adjectives the difference between rigorous and sarcastic

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 sarcastic is sarcastic.

As adjectives the difference between effective and rigorous

is that effective is having the power to produce a required effect or effects while 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.

As a noun effective

is (military) a soldier fit for duty.

Rigorous is a related term of satirical.

As adjectives the difference between rigorous and satirical

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 satirical is of, pertaining to or connected with satire.

Rigorous is a related term of bitter.

As adjectives the difference between rigorous and bitter

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 bitter is having an acrid taste (usually from a basic substance).

As a noun bitter is

(usually in the plural bitters) a liquid or powder, made from bitter herbs, used in mixed drinks or as a tonic.

As a verb bitter is

to make bitter.

Hardly is a related term of rigorous.

As an adverb hardly

is (manner|obsolete) firmly, vigorously, with strength or exertion.

As an interjection hardly

is not really.

As an adjective 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.

Constrained is a related term of rigorous.

As adjectives the difference between constrained and rigorous

is that constrained is within close bounds; confined while 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.

As a verb constrained

is (constrain).

As adjectives the difference between rigorous and gruelling

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 gruelling is so difficult or taxing as to make one exhausted; backbreaking.