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About this tool
Multiple-choice drill on 80 exam one-word substitutions, with same-family distractors and the Greek or Latin root behind every answer.
One Word Substitution Trainer drills the 80 substitutions that repeat across SSC, banking, railway and state public-service papers, in multiple-choice form with a root explanation after every answer. A one-word substitution replaces a descriptive phrase with the single word that carries the same sense — 'one who collects coins' becomes numismatist. Distractors are drawn from the same word family as the answer, because that is how real papers set them, and eliminating options by topic alone will not work here.
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Wrong options come from the same word family as the answer, so you cannot guess by topic.
Each answer names the Greek or Latin root, which is what makes the next unfamiliar word guessable.
Rounds are generated from a number you control, so any round can be reproduced exactly.
It is a single word that replaces a whole descriptive phrase without changing the meaning — 'a place where bees are kept' becomes apiary, 'government by officials' becomes bureaucracy. Competitive papers use them to test vocabulary depth rather than reading speed.
Biennial means once every two years; biannual means twice within one year. This is one of the most frequently set traps in the topic, and the same pattern applies to bimonthly, which is ambiguous enough that careful writing avoids it altogether.
Learn them in families rather than alphabetically. Once you know that -cracy means rule, -phobia means fear, -vore means eater and omni- means all, you can decode words you have never seen, which is exactly what the exam is testing.
The recurring families are agent nouns for collectors and specialists (philatelist, numismatist, lexicographer), places (apiary, aviary, granary, arsenal), forms of government (democracy, plutocracy, oligarchy), the negatives (inevitable, illegible, indelible) and the phobias. Past papers repeat these heavily, which is why all 80 items here sit in those families.