helter

As nouns the difference between welter and helter

is that welter is general confusion; disorderly mixture; aimless effort; as, a welter of papers and magazines while helter is an alternative spelling of halter rope, cord, or similar thing that fastens around the neck.

As a verb welter

is to roll; to wallow.

As an adjective welter

is of horsemen, heavyweight; as, a welter race.

As nouns the difference between helter and shelter

is that helter is (northern england|obsolete) while shelter is a refuge, haven or other cover or protection from something.

As a verb shelter is

to provide cover from damage or harassment; to shield; to protect.

As nouns the difference between heater and helter

is that heater is a device that produces and radiates heat, typically to raise the temperature of a room or building while helter is (northern england|obsolete).