ludicrous

Ludicrous is a related term of fatuous.

As adjectives the difference between ludicrous and fatuous

is that ludicrous is idiotic or unthinkable, often to the point of being funny while fatuous is obnoxiously stupid, vacantly silly, content in one's foolishness.

Senseless is a related term of ludicrous.

As adjectives the difference between senseless and ludicrous

is that senseless is bereft of feeling or consciousness; deprived of sensation; unconscious; insensible while ludicrous is idiotic or unthinkable, often to the point of being funny.

Outrageous is a related term of ludicrous.

As adjectives the difference between outrageous and ludicrous

is that outrageous is cruel, violating morality or decency; provoking indignation or affront while ludicrous is idiotic or unthinkable, often to the point of being funny.

Ludicrous is a related term of mirthful.

As adjectives the difference between ludicrous and mirthful

is that ludicrous is idiotic or unthinkable, often to the point of being funny while mirthful is filled with mirth.

Ludicrous is a related term of merry.

As an adjective ludicrous

is idiotic or unthinkable, often to the point of being funny.

As a proper noun merry is

originally a nickname for a merry person.

Ludicrous is a related term of outre.

As adjectives the difference between ludicrous and outre

is that ludicrous is idiotic or unthinkable, often to the point of being funny while outre is very unconventional.

Silly is a related term of ludicrous.

As adjectives the difference between silly and ludicrous

is that silly is (label) pitiable; deserving of compassion; helpless while ludicrous is idiotic or unthinkable, often to the point of being funny.

As a noun silly

is (colloquial) a silly person; a fool.

Ludicrous is a related term of waggish.

As adjectives the difference between ludicrous and waggish

is that ludicrous is idiotic or unthinkable, often to the point of being funny while waggish is witty, jocular, like a wag.

As adjectives the difference between ludicrous and decorous

is that ludicrous is idiotic or unthinkable, often to the point of being funny while decorous is marked by proper behavior.