Treated as the same
- Typos: banana = banaa
- Plurals: apple = apples
- Verb endings: running = run
- Spaces & dashes: ice cream = icecream = ice-cream
- Word order: red apple = apple red
- Articles: the apple = apple
- Punctuation & case: Apple! = apple
Treated as different
- Synonyms: USA ≠ America
- Abbreviations: NYC ≠ New York
- Irregular tenses: ran ≠ run
- Different short words: cat ≠ bat
Tip: when in doubt, type the simplest form (e.g. apple, not red apples).