As nouns the difference between irrationality and ridiculousness

is that irrationality is the quality or state of being irrational; want of the faculty or the quality of reason; fatuity while ridiculousness is (uncountable) the characteristic of being ridiculous.

As nouns the difference between animosity and malignity

is that animosity is violent hatred leading to active opposition; active enmity; energetic dislike while malignity is the quality of being malign or malignant; badness, evilness, monstrosity, depravity, maliciousness.

As nouns the difference between apology and explanation

is that apology is an expression of remorse or regret for having said or done something that harmed another: an instance of apologizing (saying that one is sorry) while explanation is the act or process of explaining.

As a noun normal

is standard.

As an adjective familiar is

familial.

As nouns the difference between asperity and animus

is that asperity is roughness as of stone or weather while animus is the basic impulses and instincts which govern one's actions.

As adjectives the difference between applicable and changeable

is that applicable is suitable for application, relevant while changeable is capable of being changed.

As adjectives the difference between biting and vinegarish

is that biting is causing a stinging sensation while vinegarish is tasting somewhat like vinegar.

As a verb biting

is .

As a noun biting

is the action of the verb to bite .

As nouns the difference between perception and ingenuity

is that perception is organization, identification, and interpretation of sensory information while ingenuity is the ability to solve difficult problems, often in original, clever, and inventive ways.

As verbs the difference between related and resembling

is that related is (relate) while resembling is .

As an adjective related

is standing in relation or connection.

As a noun resembling is

the action of the verb to resemble .

As adjectives the difference between villainous and infamous

is that villainous is of, relating to, or appropriate to a villain while infamous is having a bad reputation, disreputable; of bad report; notoriously vile; detestable; widely known, especially for something bad.