Synonyms of flatten

Verb

1. flatten, shape, form

usage: make flat or flatter; "flatten a road"; "flatten your stomach with these exercises"

2. flatten, flatten out, change shape, change form, deform

usage: become flat or flatter; "The landscape flattened"

3. flatten, drop, change, alter, modify

usage: lower the pitch of (musical notes)

Definition and meaning of flatten (Dictionary)