Alterers are individuals who make changes or modifications to something. There are several synonyms that can be used in place of the word alterers, including adjusters, modifiers, transformers, and converters. Adjusters are individuals who tweak or fine-tune something to improve its performance or appearance. Modifiers, on the other hand, are people who alter or adjust a specific aspect of something. Transformers refer to those who make significant changes to something, often completely changing its form. Finally, converters are individuals who convert something from one form or state into another. All of these terms convey the sense of someone who is making changes to something, although the specific nature of those changes may vary.