In lang=en terms the difference between action and execution

is that action is a charge or other process in a law court (also called lawsuit and actio) while execution is the formal process by which a contract is made valid and put into binding effect.

As nouns the difference between action and execution

is that action is something done so as to accomplish a purpose while execution is the act, manner or style of executing (actions, maneuvers, performances).

As an interjection action

is demanding or signifying the start of something, usually an act or scene of a theatric performance.

As a verb action

is to act on a request etc, in order to put it into effect.

Crowd is a related term of detachment.

As nouns the difference between crowd and detachment

is that crowd is a group of people congregated or collected into a close body without order or crowd can be (obsolete) a crwth, an ancient celtic plucked string instrument while detachment is (uncountable) the action of detaching; separation.

As a verb crowd

is to press forward; to advance by pushing or crowd can be (obsolete|intransitive) to play on a crowd; to fiddle.

As adjectives the difference between ungallant and detestable

is that ungallant is not gallant; ignoble, dishonourable, unvaliant while detestable is stimulating disgust or detestation; offensive; shocking.

Nauseating is a related term of horrid.

As adjectives the difference between nauseating and horrid

is that nauseating is causing disgust, revulsion or loathing while horrid is (archaic) bristling, rough, rugged.

Thespianism is likely misspelled.

Thespianism has no English definition.

As a noun drama

is a composition, normally in prose, telling a story and intended to be represented by actors impersonating the characters and speaking the dialogue.

As a proper noun Drama

is a town in Greece.

Concerned is a synonym of active.

As verbs the difference between concerned and active

is that concerned is (concern) while active is .

As an adjective concerned

is showing concern.

Inadequate is a related term of trifling.

As adjectives the difference between inadequate and trifling

is that inadequate is while trifling is trivial, or of little importance.

As a noun trifling is

the act of one who trifles; frivolous behaviour.

As adjectives the difference between nefarious and abominable

is that nefarious is sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics while abominable is worthy of, or causing, abhorrence, as a thing of evil omen; odious in the utmost degree; very hateful; detestable; loathsome; execrable.

Happiness is a related term of heaven.

As a noun happiness

is the emotion of being happy; joy.

As a proper noun heaven is

(religion) the abode of god or the gods, when considered as a specific location; the abode of the blessed departed who reside in the presence of god or the gods.

History is a related term of statement.

As nouns the difference between history and statement

is that history is the aggregate of past events while statement is a declaration or remark.

As verbs the difference between history and statement

is that history is (obsolete) to narrate or record while statement is to provide an official document of a proposition, especially in the uk a statement of special educational needs.