ElevenUp — interactive 11 plus practice for ages 9–11

20 essential 11 plus words

Vocabulary decides more 11 plus marks than any other single skill. Here are twenty words that come up again and again, each with a sentence, synonyms and antonyms.

Last updated September 2026 · 7 min read

How to use this list. Read the sentence first, then cover the synonyms and ask your child to supply one. Then do the same for the antonyms. That flip — same meaning, then opposite meaning — is exactly what the paper tests, and it is much harder than recognising a definition.

A note on why this matters. In a "closest in meaning" question, the wrong answers are deliberately nearly right, and one is often the exact opposite of the target word. A child who knows a word only vaguely will be caught. A child who can produce both a synonym and an antonym on demand will not.

Word, meaning & exampleSynonymsAntonyms
Abundant
existing in very large quantities
“After the summer rain, the garden was abundant with butterflies.”
plentiful, ample, copiousscarce, sparse
Reluctant
unwilling; hesitant
“She was reluctant to get out of bed on the first frosty morning.”
hesitant, unwilling, disinclinedeager, willing, keen
Conceal
to hide from view
“He tried to conceal the present behind his back.”
hide, disguise, coverreveal, expose, disclose
Feeble
weak; lacking strength
“The kitten gave a feeble miaow, too tired to play.”
frail, weak, faintrobust, sturdy, powerful
Tranquil
calm and peaceful
“The lake was so tranquil we could see the clouds reflected in it.”
serene, peaceful, placidturbulent, agitated, chaotic
Obstinate
stubbornly refusing to change
“The obstinate pony refused to move, however gently we pulled.”
stubborn, headstrong, wilfulcompliant, flexible, yielding
Commence
to begin
“The head teacher announced that the concert would commence at seven.”
begin, start, initiateconclude, cease, finish
Diminish
to make or become smaller
“As we walked away, the sound of the music began to diminish.”
decrease, dwindle, shrinkincrease, expand, amplify
Vital
absolutely necessary
“Drinking enough water is vital if you are playing sport all afternoon.”
essential, crucial, indispensabletrivial, unnecessary, minor
Hostile
unfriendly and aggressive
“The swan gave us a hostile stare as we neared its nest.”
antagonistic, unfriendly, aggressivefriendly, amiable, welcoming
Candid
honest and direct
“Her friend was candid and admitted she had forgotten the book.”
frank, blunt, forthrightevasive, guarded, secretive
Novice
a beginner
“Although she was a novice at chess, she beat her uncle.”
beginner, apprentice, learnerexpert, veteran, master
Peril
serious danger
“The explorers were in great peril when the storm swept in.”
danger, hazard, jeopardysafety, security
Lenient
not strict; merciful
“Their teacher was lenient about the late homework.”
merciful, tolerant, indulgentstrict, severe, harsh
Genuine
real and authentic
“She gave a genuine smile when she saw who was waiting.”
authentic, real, sincerefake, counterfeit, artificial
Resilient
able to recover quickly
“He was resilient: he lost the first round but won the next.”
tough, hardy, adaptablefragile, brittle, vulnerable
Frugal
careful with money
“Being frugal all term meant she could afford the bike.”
thrifty, economical, sparingextravagant, wasteful, lavish
Arduous
requiring great effort
“The final mile was arduous, uphill and against the wind.”
strenuous, laborious, gruellingeasy, effortless, simple
Conspicuous
very easy to notice
“Her bright red coat was conspicuous in the grey crowd.”
obvious, prominent, noticeableinconspicuous, hidden, subtle
Ambiguous
unclear; open to more than one meaning
“His answer was so ambiguous that nobody knew if he agreed.”
unclear, vague, equivocalclear, definite, explicit

Three ways to make these stick

  1. Use it in a sentence about their own life. "Give me a sentence with reluctant about our house." Personal sentences are remembered far better than abstract ones.
  2. Ask for the opposite, not the definition. Producing an antonym forces a deeper level of processing than recognising a meaning.
  3. Come back after a few days. Spacing beats repetition. Five words revisited across two weeks beat twenty crammed in one evening.

What to do next

Twenty words is a start; the useful working vocabulary for the 11 plus runs to several hundred. Read widely — that is still the single most effective route — and drill a curated list alongside it so the highest-frequency words are secure.

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