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1. Write all the required information onto a form
   "fill out this questionnaire, please!"
   - complete, fill in, make out
    
2. Make bigger or better or more complete
   - round out
    
3. Supplement what is thought to be deficient
   - eke out
    
4. Line or stuff with soft material
   - pad
    
5. Make fat or plump
   - fatten, fat, flesh out, plump, plump out, fatten out, fatten up
    
6. Become round, plump, or shapely
   - round, flesh out

Derived forms: filled out, filling out, fills out

See also: fill

Type of: alter, change, enrich, gain, modify, put on, stuff, supplement