reciprocating engine

noun 0.723

reciprocation

noun 0.692

reciprocal

noun 0.692

reciprocity

noun 0.601

compensator

noun 0.588

compressor

noun 0.573

reproducer

noun 0.567

recycler

noun 0.556

piston

noun 0.552

reciprocal pronoun

noun 0.551

pressor

noun 0.547

respirator

noun 0.545

conciliator

noun 0.543

replicator

noun 0.542

positive displacement pump

noun 0.541

reconciler

noun 0.541

resuscitator

noun 0.539

exchanger

noun 0.538

accommodator

noun 0.538

repeater

noun 0.534

reciprocity principle

noun 0.534

commutator

noun 0.532

regenerator

noun 0.531

anticipator

noun 0.531

exerciser

noun 0.528

recuperative

noun 0.527

swapper

noun 0.526

actuator

noun 0.525

appreciator

noun 0.524

gyrator

noun 0.523

repairer

noun 0.523

reciter

noun 0.522

recidivist

noun 0.520

extrapolator

noun 0.520

invertor

noun 0.519

rebreather

noun 0.517

integrator

noun 0.516

compactor

noun 0.515

renovator

noun 0.514

rectifier

noun 0.514

hand crank

noun 0.514

redistributor

noun 0.513

duplicator

noun 0.511

resonator

noun 0.511

perambulator

noun 0.510

stepper

noun 0.509

copier

noun 0.509

rotary engine

noun 0.508

reversing valve

noun 0.508

rehabilitator

noun 0.508

air compressor

noun 0.508

returner

noun 0.507

transactor

noun 0.507

pumper

noun 0.506

compromiser

noun 0.505

oscillator

noun 0.504

renewer

noun 0.504

piston engine

noun 0.503

lubricator

noun 0.502

synchronizer

noun 0.501