12-letter words that end in ain
- the mountain — an extremist faction during the French Revolution led by Danton and Robespierre
- timing chain — a chain for driving the camshaft of an internal-combustion engine from the crankshaft.
- toilet-train — to train (a young child) to use a toilet for bowel and bladder movements.
- vice-captain — a person who deputizes for a captain and serves in his or her place during his or her absence or indisposition
- walled plain — a circular or almost circular area on the moon, sometimes with a floor that is depressed, usually partially enclosed by walls that rise to varying heights and that are usually lower than those of a crater.
- washfountain — a large, usually circular wash basin, as in an industrial plant, in which a spray of water activated by foot pedal allows several workers to wash simultaneously.
- weight-train — to use weights to improve muscle performance