The phrase "under the garb of" is often used to describe an action that is disguised as something else. There are many synonyms for this phrase that can be used to convey the same meaning. Some alternatives include "masked as," "posing as," "cloaked in," "disguised as," "pretending to be," and "feigning." All of these phrases suggest that the action being described is misleading, dishonest, or deceptive in some way. By using these synonyms, writers can avoid repetition and add complexity to their writing, while still conveying the same message.