As an adjective unworkable

is not workable or operable; not practical; unmanageable.

As a noun nonsolution is

that which is not a solution; a proposed solution that is ineffective or unworkable.

As adjectives the difference between metaphorical and nonmetaphorical

is that metaphorical is pertaining to or characterized by a metaphor; figurative; symbolic while nonmetaphorical is not metaphorical.

As adjectives the difference between monogamous and nonmonogamous

is that monogamous is being married to one person at a time while nonmonogamous is not monogamous.

As adjectives the difference between meaningful and nonmeaningful

is that meaningful is having meaning, significant while nonmeaningful is not meaningful.

As a noun nasal

is nasal consonant.

As an adjective nonnasal is

not nasal.

As adjectives the difference between speculative and nonspeculative

is that speculative is while nonspeculative is not speculative.

As adjectives the difference between microbial and nonmicrobial

is that microbial is of, relating to, or caused by microbes or microorganisms while nonmicrobial is not microbial.

As adjectives the difference between metropolitan and nonmetropolitan

is that metropolitan is pertaining to the see or province of a metropolitan while nonmetropolitan is not metropolitan.

As a noun metropolitan

is a bishop empowered to oversee other bishops; an archbishop.

As nouns the difference between necessity and nonnecessity

is that necessity is the quality or state of being necessary, unavoidable, or absolutely requisite while nonnecessity is that which is not a necessity.

As a verb hospitalize

is to send to hospital; to admit (a person) to hospital.

As an adjective nonhospitalized is

not hospitalized.