Synonyms

As adjectives the difference between dark and unlit

is that dark is having an absolute or (more often) relative lack of light while unlit is not lit.

As a noun dark

is a complete or (more often) partial absence of light.

As nouns the difference between invasion and invasion

is that invasion is a military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government while invasion is a military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.

Increase is a synonym of production.

As nouns the difference between increase and production

is that increase is an amount by which a quantity is increased while production is the act of producing, making or creating something.

As a verb increase

is (of a quantity) to become larger.

Smart is a synonym of tart.

As a proper noun smart

is .

As an adjective tart is

sharp to the taste; acid; sour.

As a noun tart is

a type of small open pie, or piece of pastry, containing jelly or conserve; a sort of fruit pie or tart can be (british|slang) a prostitute.

As a verb tart is

to practice prostitution.

Harddihood is a synonym of stoutness.

As a noun stoutness is

(usually|uncountable) a state or quality of being stout.

Fit is a synonym of congruous.

As an abbreviation fit

is (travel industry|aviation) fully inclusive tour.

As an adjective congruous is

corresponding in character.

Piety is a synonym of religiousness.

As nouns the difference between piety and religiousness

is that piety is (uncountable) reverence and devotion to god while religiousness is the quality of being religious; religiosity.

As adjectives the difference between legal and constitutional

is that legal is relating to the law or to lawyers while constitutional is relating to a legal or political constitution.

As nouns the difference between legal and constitutional

is that legal is paper in sheets 8½ in × 14 in (215.9 mm × 355.6 mm) while constitutional is a walk that is taken regularly for good health and wellbeing.

As a proper noun Legal

is a town in Alberta, Canada.

Compassionate is a synonym of sympathizing.

As verbs the difference between compassionate and sympathizing

is that compassionate is (archaic) to feel compassion for; to pity, feel sorry for while sympathizing is .

As an adjective compassionate

is having, feeling or showing compassion; sympathetic.

In uncountable terms the difference between exuberance and wantonness

is that exuberance is the quality of being exuberant; cheerful or vigorous enthusiasm; liveliness while wantonness is the state or characteristic of being wanton; recklessness, especially as represented in lascivious or other excessive behavior.