Answer: rects

AnswerCrossword Clue
RECTSFits a valve
RECTSChurchmen: Abbr.
RECTSMinisters' houses: Abbr.
RECTSProofs of payment: Abbr.
RECTSCertain parallelograms: Abbr.
RECTSAcknowledgments of pmt.
RECTSGeom. figures
RECTSFour-sided figs.
RECTSGeom. subjects
RECTSNotices of payt.