We don't have synonyms for greenmails yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are greenmail, greenmailer and greenmailers.
(n) :
The profiting from an attempted hostile takeover by forcing the target company to buy back the hostile bidder's shares at an inflated price.
(v) :
(transitive) To profit from an attempted hostile takeover by forcing the target company to buy back the hostile bidder's shares at an inflated price.
(n) :
The profiting from an attempted hostile takeover by forcing the target company to buy back the hostile bidder's shares at an inflated price.
(v) :
(transitive) To profit from an attempted hostile takeover by forcing the target company to buy back the hostile bidder's shares at an inflated price.