As nouns the difference between sign and classification

is that sign is a visible indication while classification is the act of forming into a class or classes; a distribution into groups, as classes, orders, families, etc., according to some common relations or attributes.

As a verb sign

is to make a mark.

Wax is a related term of mushroom.

In lang=en terms the difference between wax and mushroom

is that wax is to remove hair at the roots from (a part of the body) by coating the skin with a film of wax that is then pulled away sharply while mushroom is to grow quickly to a large size.

As nouns the difference between wax and mushroom

is that wax is beeswax or wax can be (rare) the process of growing or wax can be (dated|colloquial) an outburst of anger while mushroom is any of the fleshy fruiting bodies]] of [[fungus|fungi typically produced above ground on soil or on their food sources (such as decaying wood).

As adjectives the difference between wax and mushroom

is that wax is made of wax while mushroom is having characteristics like those of a mushroom, for example in shape or appearance, speed of growth, or texture.

As verbs the difference between wax and mushroom

is that wax is to apply wax to (something, such as a shoe, a floor, a car, or an apple), usually to make it shiny or wax can be to increasingly assume the specified characteristic, become while mushroom is to grow quickly to a large size.

Precursor is a related term of messenger.

As nouns the difference between precursor and messenger

is that precursor is that which precurses, a forerunner, a predecessor, an indicator of approaching events while messenger is one who brings messages.

As a verb messenger is

to send something by messenger.

As adjectives the difference between certificated and proficient

is that certificated is that has been subject to certification while proficient is good at; skilled; fluent; practiced, especially in relation to a task or skill.

As a verb certificated

is past tense of certificate.

As a noun proficient is

an expert.

Sickening is a related term of sinful.

As adjectives the difference between sickening and sinful

is that sickening is causing sickness or disgust while sinful is full of sin; wicked; iniquitous; unholy.

As a verb sickening

is .

As a noun sickening

is the act of making somebody sick.

Softness is a related term of lightness.

As nouns the difference between softness and lightness

is that softness is the quality of being soft while lightness is (uncountable) the condition of being illuminated or lightness can be the state of having little weight, or little force.

Elementary is a related term of indispensable.

As adjectives the difference between elementary and indispensable

is that elementary is relating to the basic, essential or fundamental part of something while indispensable is (ecclesiastical|obsolete) not admitting ecclesiastical dispensation; not subject to release or exemption; that cannot be allowed by bending the canonical rules.

As a noun indispensable is

a thing that is not dispensable; a necessity.

Message is a related term of punishment.

As nouns the difference between message and punishment

is that message is a communication, or what is communicated; any concept or information conveyed while punishment is the act or process of punishing, imposing and/or applying a sanction.

As a verb message

is to send a message to; to transmit a message to, as text via a cell phone.

As nouns the difference between cure and relief

is that cure is a method, device or medication that restores good health while relief is the removal of stress or discomfort.

As a verb cure

is to restore to health.

Rudeness is a related term of presumptuousness.

As nouns the difference between rudeness and presumptuousness

is that rudeness is the property of being rude while presumptuousness is the state of being presumptuous.