certain

As adjectives the difference between certain and essential

is that certain is certain while essential is necessary.

As a noun essential is

a necessary ingredient.

As an adjective certain

is certain.

As a noun possibility is

the quality of being possible.

As a verb maintain

is to support (someone), to back up or assist (someone) in an action.

As an adjective certain is

sure, positive, not doubting.

As a determiner certain is

having been determined but unspecified. The quality of some particular subject or object which is known by the speaker to have been specifically singled out among similar entities of its class.

As adjectives the difference between certain and consistent

is that certain is sure, positive, not doubting while consistent is of a regularly occurring, dependable nature.

As a determiner certain

is having been determined but unspecified. The quality of some particular subject or object which is known by the speaker to have been specifically singled out among similar entities of its class.

As a noun consistent is

objects or facts that are coexistent, or in agreement with one another.

As a verb worry

is to seize or shake by the throat, especially of a dog or wolf.

As a noun worry

is a strong feeling of anxiety.

As an adjective certain is

certain.

As a proper noun chance

is , an american pet form of chauncey, in modern usage also associated with the word chance.

As an adjective certain is

certain.

Certain is a related term of arbitrary.

As adjectives the difference between certain and arbitrary

is that certain is certain while arbitrary is (usually|of a decision) based on individual discretion or judgment; not based on any objective distinction, perhaps even made at random.

As a noun arbitrary is

anything arbitrary, such as an arithmetical value or a fee.

Certain is a related term of careless.

As adjectives the difference between certain and careless

is that certain is certain while careless is (lb) free from care; unworried, without anxiety.

As adjectives the difference between certain and conscious

is that certain is certain while conscious is alert, awake.