unnecessary

As adjectives the difference between avoidable and unnecessary

is that avoidable is capable of being vacated; liable to be annulled or made invalid; voidable while unnecessary is not needed or necessary.

As a noun avoidable

is something that can be avoided.

As adjectives the difference between unnecessary and undefined

is that unnecessary is not needed or necessary while undefined is lacking a definition or value.

As an adverb necessarily

is inevitably; of necessity.

As an adjective unnecessary is

not needed or necessary.

As adjectives the difference between frivolous and unnecessary

is that frivolous is silly, especially at an inappropriate time or in an inappropriate manner while unnecessary is not needed or necessary.

As adjectives the difference between unnecessary and excess

is that unnecessary is not needed or necessary while excess is more than is normal, necessary or specified.

As a noun excess is

the state of surpassing or going beyond limits; the being of a measure beyond sufficiency, necessity, or duty; that which exceeds what is usual or proper; immoderateness; superfluity; superabundance; extravagance; as, an excess of provisions or of light.

As adjectives the difference between unnecessary and primary

is that unnecessary is not needed or necessary while primary is the first in a group or series.

As a noun primary is

a primary election; a preliminary election to select a political candidate of a political party.

As a verb primary is

(us|intransitive) to take part in a primary election.

As an adjective unnecessary

is not needed or necessary.

As a noun null is

zero, nil; the cardinal number before einn.

As adjectives the difference between unnecessary and unreasonable

is that unnecessary is not needed or necessary while unreasonable is not reasonable.

As adjectives the difference between unnecessary and petty

is that unnecessary is not needed or necessary while petty is little, small, secondary in rank or importance.

As a proper noun Petty is

{{surname|lang=en}.

As adjectives the difference between unnoticed and unnecessary

is that unnoticed is not noticed while unnecessary is not needed or necessary.