greatest

As adjectives the difference between greatest and superb

is that greatest is (great) while superb is .

As a determiner most

is superlative form of much.

As an adverb most

is superlative form of many.

As a noun most

is the greatest amount.

As an adjective greatest is

superlative of great.

As a noun maximum

is .

As an adjective greatest is

(great).

Important is a synonym of greatest.

As adjectives the difference between greatest and important

is that greatest is superlative of great while important is having relevant and crucial value.

Ruling is a related term of greatest.

As adjectives the difference between ruling and greatest

is that ruling is that rules; predominant; chief; reigning; controlling while greatest is (great).

As a noun ruling

is an order or a decision on a point of law from someone in authority.

As a verb ruling

is .

As adjectives the difference between greatest and best

is that greatest is superlative of great while best is superlative of good.

As an adverb best is

superlative of well POS=adverb.

As a noun best is

the supreme effort one can make, or has made.

As a verb best is

to surpass in skill or achievement.

As a proper noun Best is

{{surname}.

Primary is a synonym of greatest.

As adjectives the difference between primary and greatest

is that primary is the first in a group or series while greatest is (great).

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.

Greatest is a synonym of principal.

As adjectives the difference between principal and greatest

is that principal is primary; most important while greatest is superlative of great.

As a noun principal

is the money originally invested or loaned, on which basis interest and returns are calculated.

As adjectives the difference between greatest and necessary

is that greatest is superlative of great while necessary is needed, required.

As a noun necessary is

bathroom, toilet, loo.