Irregular and Regular Plural Nouns

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Across
  1. 3. is the singular of dogs
  2. 4. is the singular of bases
  3. 6. is not correct to say.
  4. 7. is the plural of cactus.
Down
  1. 1. nouns are normally things but there are some exceptions with animals.
  2. 2. are people, animal and .....
  3. 5. nouns usually changes the structure of the noun.
  4. 6. is the correct way to say.