Homeowners squeezed by the subprime mortgage crisis are turning up in New Jersey’s federal court, where a half-dozen suits accuse lenders and mortgage brokers of promising favorable terms and then substituting costlier ones.

The plaintiffs charge violations of the federal Truth in Lending Act and the state Consumer Fraud Act, along with common-law causes of action, and seek mortgage rescission, treble damages, punitive damages, attorney fees and costs.