As adjectives the difference between proprietary and hidden

is that proprietary is of or relating to property or ownership, as proprietary rights while hidden is that has been moved out of sight invisible or unapparent.

As a noun proprietary

is a proprietor or owner.

As a verb hidden is

.

As a verb stymied

is (stymie).

As an adjective speechless is

not speaking; not knowing what to say; silent, especially due to surprise, amazement, etc.

As a noun irony is

a statement that, when taken in context, may actually mean something different from, or the opposite of, what is written literally; the use of words expressing something other than their literal intention, often in a humorous context.

As an adjective irony is

of or pertaining to the metal iron.

As nouns the difference between threat and request

is that threat is an expression of intent to injure or punish another while request is act of requesting.

As verbs the difference between threat and request

is that threat is to press; urge; compel while request is to express the need or desire for.

As adjectives the difference between irreconcilable and mismatched

is that irreconcilable is unable to be reconciled; opposed; uncompromising while mismatched is unsuitably matched; ill joined.

As a noun irreconcilable

is something that cannot be reconciled.

As a verb mismatched is

(mismatch).

In architecture terms the difference between facet and offset

is that facet is the narrow plane surface between flutings of a column while offset is a horizontal ledge on the face of a wall, formed by a diminution of its thickness, or by the weathering or upper surface of a part built out from it; a set-off.

As nouns the difference between facet and offset

is that facet is any one of the flat surfaces cut into a gem while offset is anything that acts as counterbalance; a compensating equivalent.

As verbs the difference between facet and offset

is that facet is to cut a facet into a gemstone while offset is to compensate for something.

As a noun offset is

anything that acts as counterbalance; a compensating equivalent.

As a verb offset is

to compensate for something.

As a noun injustice

is absence of justice; unjustice.

As an adjective justified is

having a justification.

As a verb justified is

past tense of justify.

As adjectives the difference between competitive and rival

is that competitive is while rival is having the same pretensions or claims; standing in competition for superiority.

As a noun rival is

a competitor (person, team, company, etc) with the same goal as another, or striving to attain the same thing defeating a rival may be a primary or necessary goal of a competitor.

As a verb rival is

to oppose or compete with.

As nouns the difference between demography and economics

is that demography is the study of human populations, and how they change while economics is the study of resource allocation, distribution and consumption; of capital and investment; and of management of the factors of production.