- Academic
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See cooperation in a sentence written about what you actually care about
Brevlex writes every example sentence around your interests, then schedules it with spaced repetition so it sticks. No generic textbook line — a sentence for you.
Verified against
- Academic Word List (Coxhead 2000)Authoritative
- CEFR-J v1.5 + Octanove C1/C2Authoritative
- New General Service List (Browne et al. 2013)Authoritative
- Open English WordNet 2024Authoritative
- Nursing Word ListAuthoritative
- Israeli Psychometric English dictionary (Campus IL / NITE)Authoritative
- Science Vocabulary ListAuthoritative
Each source is a real, checkable word list that contains cooperation. We never claim an official exam-board list — none is published for the GRE, GMAT, or SAT.