Synonym: basic, fundamental, important, necessary, needed, required, vital. Similar words: essentially, essentiality, potential, potentially, tangential, residential, influential, presidential. Meaning: [ɪ'senʃl] 
n. anything indispensable. adj. 1. absolutely necessary; vitally necessary 2. basic and fundamental 3. of the greatest importance 4. being or relating to or containing the essence of a plant etc 5. defining rights and duties as opposed to giving the rules by which rights and duties are established 6. absolutely required and not to be used up or sacrificed.
n. anything indispensable. adj. 1. absolutely necessary; vitally necessary 2. basic and fundamental 3. of the greatest importance 4. being or relating to or containing the essence of a plant etc 5. defining rights and duties as opposed to giving the rules by which rights and duties are established 6. absolutely required and not to be used up or sacrificed. 
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(91) Immediate vacation of the house is essential.
(92) The exercise of patience is essential in diplomatic negotiations.
(93) Speed is the essential ingredient of all athletics.
(94) A balanced diet is essential for healthy growth.
(95) Surprise is an essential component of my plan.
(96) It's essential that you attend all the meetings.
(97) Registering an Internet domain name is now an essential part of setting up a company.
(98) Extra safety precautions are essential in homes where older people live.
(99) He rephrased the report in order to clear the essential points.
(100) Although not essential, some prior knowledge of statistics is desirable.
(101) It is essential for all players who wish to compete that they earn computer ranking points.
(102) Some cautions must be mentioned-for example good tools are essential to do the job well.
(103) It's essential that she has this medicine, and the cost is neither here nor there.
(104) Vaccination is essential to protect people exposed to hepatitis B infection.
(105) Polyunsaturated oils are essential for health. Excess is harmful, however.
(106) Because I live in a remote village, I regard my car as an essential.
(107) It is essential that we present a united front .
(108) In this trial two essential elements must be proven: motive and opportunity.
(109) The bridge will remain closed until essential repair work has been carried out.
(110) Good information is essential if people are to make informed choices about services.
(111) The authorities have said they will attempt to maintain essential services.
(112) Places on the course are limited and advance booking is essential.
(113) The essential character of the town has been destroyed by the new road.
(114) Investment in new product development is an essential ingredient of corporate success.
(115) The essential difference between Sara and me is in our attitude to money.
(116) It is essential that you are able to read a thermometer.
(117) It is essential for us to know all the facts.
(118) It is stating the obvious,[http://sentencedict.com/essential.html] but regular measurement of blood pressure is essential in older people.
(119) It will be essential to establish how the money is being spent.
(120) As they must also sprint over short distances, speed is essential.
More similar words: essentially, essentiality, potential, potentially, tangential, residential, influential, presidential, essence, sentiment, substantial, substantially, assessment, differentiate, passenger, assess, vessel, initial, partial, dessert, finesse, partially, palatial, initially, depressed, senseless, absent, present, consent, sentence.