What GRE, CAT and GMAT
Vocabulary Have in Common
Three different exams, three different formats, three different aspirations. But the vocabulary they test overlaps far more than most test-takers realise — and that overlap is where your preparation should live.
Three Exams, One Underlying Question
The GRE is a gateway to graduate school in the United States. The CAT is the entrance examination for India's IIMs. The GMAT is the standard for business school admissions worldwide. In format, scoring, and emphasis they differ considerably. Yet ask any serious test-prep teacher what they drill hardest, and you will get a remarkably similar list of words.
This is not a coincidence. All three exams are trying to measure the same underlying thing: your ability to read complex, formal prose, extract precise meaning, and reason with language under time pressure. Vocabulary is not tested for its own sake on any of these exams. It is tested because it is the bottleneck. If you do not know what equivocate means, you cannot follow an argument that turns on whether someone is equivocating. If laconic is unfamiliar, a reading passage describing a laconic character becomes harder to parse.
The vocabulary these exams share is the vocabulary of careful, formal English — the kind found in editorial writing, academic argument, legal reasoning, and literary criticism.
The Shared Core
Words like perfidious, loquacious, acrimonious, vociferous, pedantic, and ostentatious appear with striking regularity across GRE word lists, CAT verbal sections, and GMAT critical reasoning passages. These are not arbitrary choices. They are words that educated writers actually use to make fine distinctions that ordinary words cannot.
Consider equivocate versus lie. To lie is to state something false. To equivocate is to use ambiguous language in order to mislead — while technically staying true. That distinction matters enormously in legal writing, political analysis, and business communication. Exams test equivocate because understanding it signals that you can handle that level of precision.
Or consider laconic versus brief. Both describe conciseness. But laconic specifically implies a deliberate, almost studied terseness — the Spartans were called Laconic because they spoke so few words. A passage describing a CEO as laconic is telling you something different from describing her as brief. Test-makers know this. They choose words that carry weight.
Where the Exams Differ
The shared core is real, but the emphasis differs — and knowing the differences helps you prioritise.
The GRE Verbal section is the most vocabulary-intensive of the three. Text Completion and Sentence Equivalence questions require you to select words that fit precisely into a sentence — sometimes choosing between two words that mean almost the same thing. The GRE rewards fine discrimination: knowing not just that garrulous means talkative, but how it differs from voluble, which differs again from loquacious. For GRE, depth of vocabulary knowledge matters more than breadth.
The CAT Verbal Ability section tests vocabulary differently — more through reading comprehension and para-jumbles than direct vocabulary questions. The vocabulary you need for CAT is slightly more accessible than peak GRE words, but you need it at speed. The CAT rewards recognition and rapid inference: encountering enervate in a passage and knowing immediately that it means to weaken — without pausing.
The GMAT, since its restructuring, tests vocabulary almost entirely through reading comprehension and critical reasoning. You will rarely be asked to define a word directly. Instead, precise vocabulary is embedded in dense passages where misreading a single term can lead you to the wrong answer on three questions. For GMAT, contextual vocabulary — understanding words as they function in arguments — matters most.
The Practical Implication
If you are preparing for any of these three exams, or planning to prepare for more than one, the strategic implication is clear: there is a vocabulary core worth building that serves all three. Roughly 2,000 to 3,000 words — formal, precise, rooted in Latin and Greek — appear across the canonical word lists for all three exams. These words are not exotic curiosities. They are the working vocabulary of educated professional prose.
Building that core is the highest-leverage investment you can make in verbal preparation. It pays dividends on the exam you are taking, on the exams you might take later, and on the reading you will do for the rest of your professional life.
The words are not the finish line. They are the floor.
How Lemmerly Approaches This
Lemmerly's corpus of 100,000+ words is tagged by exam — GRE, CAT, GMAT, SAT, IELTS — and every word has an ELO rating reflecting its actual difficulty as measured by user performance. This means you can see not just which words appear on your target exam, but how hard they actually are relative to your current level.
A word rated at 1,400 ELO on Lemmerly is genuinely in the middle of the difficulty range for formal vocabulary. A word at 1,600 will trip up most university graduates. Knowing where you stand on the difficulty curve — and which words are just above your current level — is more useful than working through a flat list from A to Z.
The spaced repetition system ensures you spend time on words you actually miss, not words you already know. The grammar session tests the same words in a different modality — sentence correction, word form, error identification — because recognising a word in a definition is not the same as using it correctly under pressure.
Whether you are preparing for the GRE, the CAT, the GMAT, or all three, the vocabulary is largely the same. The question is only how deeply you know it.