they are valid > synonyms

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Special characters '?' and '*':

• ??? - shows 3-letter terms
• a??e - 4-letter terms starting with 'a' and ending with 'e'
• a* - terms starting with 'a'
• *ment - terms ending with 'ment'

If nothing is found, then alternative search will try to find the terms that:

• start with searched query
• sound like it
• similar to it