Synonyms

Breakdown is a synonym of deterioration.

As nouns the difference between breakdown and deterioration

is that breakdown is a failure, particularly mechanical; something that has failed while deterioration is deterioration.

Clemency is a synonym of tolerance.

As nouns the difference between clemency and tolerance

is that clemency is the gentle or kind exercise of power; leniency, mercy; compassion in judging or punishing while tolerance is tolerance.

Celestial is a synonym of blissful.

As adjectives the difference between celestial and blissful

is that celestial is relating to heaven in a religious sense while blissful is extremely happy; full of joy; experiencing, indicating, causing, or characterized by bliss.

As a noun celestial

is an inhabitant of heaven or celestial can be (obsolete|sometimes|capitalized) a native of china.

Addition is a synonym of encompassing.

As a noun addition

is addition.

As a verb encompassing is

.

Portentous is a synonym of alarming.

As adjectives the difference between portentous and alarming

is that portentous is of momentous or ominous significance while alarming is causing apprehension, fear or alarm; frightening.

As a verb alarming is

.

As adjectives the difference between fragile and soft

is that fragile is easily broken or destroyed, and thus often of subtle or intricate structure while soft is easily giving way under pressure.

As an interjection soft is

be quiet; hold; stop; not so fast.

As an adverb soft is

softly; without roughness or harshness; gently; quietly.

As a noun soft is

a soft or foolish person; an idiot.

Coldblooded is a synonym of unresponsive.

As adjectives the difference between coldblooded and unresponsive

is that coldblooded is while unresponsive is not responsive; unreactive.

As adjectives the difference between plain and unreserved

is that plain is flat, level while unreserved is not reserved.

As an adverb plain

is simply.

As a noun plain

is a lamentation.

As a verb plain

is to lament, bewail.

Lax is a synonym of unconscientious.

As an adjective unconscientious is

not conscientious.

Brilliance is a synonym of keenness.

As nouns the difference between brilliance and keenness

is that brilliance is the quality of being exceptionally effulgent (giving off light) while keenness is sharpness or cutting ability.