piggyback

noun 0.937

hitchhiking

noun 0.630

hitching

noun 0.622

pillion

noun 0.580

backpacking

noun 0.571

hopping

noun 0.559

piggy

noun 0.557

borrowing

noun 0.556

backloading

noun 0.554

hijacking

noun 0.553

barebacking

noun 0.548

mooching

noun 0.548

bridging

noun 0.547

shouldering

noun 0.541

leapfrogging

noun 0.539

backing

noun 0.538

bootstrapping

noun 0.536

tailgating

noun 0.535

hijack

noun 0.533

boosting

noun 0.529

boarding

noun 0.524

freebooting

noun 0.524

hitch

noun 0.522

parroting

noun 0.519

hitchhiker

noun 0.518

piling

noun 0.517

carrying

noun 0.517

leg up

noun 0.513

riding

noun 0.512

bagging

noun 0.512

hogging

noun 0.510

carrying-on

noun 0.507

shoulder surfing

noun 0.507

propping

noun 0.507

pied-piping

noun 0.507

carpool

noun 0.507

tacking

noun 0.506

ridesharing

noun 0.503