parallel

paralleled

parallelepiped

parallelepipeds

paralleling

parallelism

parallelisms

parallelled

parallelling

parallelogram

parallelograms

parallels

pedalled

pedaller

pedallers

pedestalled

petalled

pinballed

preinstalled

rallentando

recalled

recaller

recallers

rechallenge

rechallenged

rechallenges

rechallenging

redialled

refallen

reinstalled

retotalled

revictualled

rivalled

robocalled

sallet

sallets

sandalled

scandalled

sepalled

signalled

signaller

signallers

smaller

smallest

snowballed

softballer

softballers

spalled

spaller

spallers