Difference between Idler and Layabout

IDLER vs LAYABOUT: NOUN

One who idles; a lazy person; a sluggard.
An idle wheel or pulley. See under Idle.
One who has constant day duties on board ship, and keeps no regular watch.
In machinery, an idle-wheel.
On board a whaler, one who is not required to assist in the capture of whales.
Nautical, a member of a ship's crew who is not required to keep night-watch.
One who idles; one who spends his time in inaction, or without occupation or employment; a lounging or lazy person; a sluggard.
In railroading, an empty car; an empty.
Person who does no work

Middle, Intermediates, Medium, Meso, Intermedia, Intermediary, Intermediate, Midrange, Lazybones, Sprockets, Countershaft, Do nothing, Bum, Loafer, Layabout

Doofus, Lowlife, Dullard, Schlub, Sponger, Drunkard, Oaf, Lout, Scrounger, Workshy, Wastrel, Do nothing, Bum, Idler, Loafer

Secondary, Mezz, Drone, Buffer, Middle, Medium, Meso, Intermediary, Intermediate, Midrange, Lazybones, Countershaft, Bum, Loafer, Layabout

Lunkhead, Prole, Doofus, Lowlife, Dullard, Schlub, Sponger, Drunkard, Oaf, Lout, Workshy, Wastrel, Bum, Idler, Loafer

Idler cars do not carry cargo or loads.
New member needs tiller Identification for idler replacement.
There are no idler chains on Admiral models.
What lubricant should be used onthe idler shaft?
Slide the idler pulley onto the idler pulley stud while holding the belt in place.
Like carrying idler roller or troughing idler roller, mainly used to support the belt and load in the transport section of the conveyor.
Absence of a SPCU shipment condition defining an idler car charge will result in no idler charges being assessed on the shipment.
The drive belt idler pulleys, idler carriage, and spring all are welll lubricated and fully fuctioning.
Tighten the transmission idler pulley retaining nut with a socket wrench to secure the idler pulley to the idler pulley stud.
The incorrigible idler will remain forever an idler if feel and warmed.

Who would you choose: The boring, successful businessman or the romantic layabout?