welder

As a noun welder

is one who welds, or unites pieces of iron, etc, by welding.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between welder and boilermaker

is that welder is one who welds, or unites pieces of iron, etc., by welding while boilermaker is a person qualified to make or repair boilers.

As a noun welder

is one who welds, or unites pieces of iron, etc, by welding.

As a proper noun weldon is

.

As nouns the difference between pipefitter and welder

is that pipefitter is an industrial tradesman who installs and maintains piping systems while welder is one who welds, or unites pieces of iron, etc, by welding.

As nouns the difference between fitter and welder

is that fitter is a person who fits or assembles something while welder is one who welds, or unites pieces of iron, etc., by welding.

As an adjective fitter

is comparative form of fit.

As nouns the difference between solderer and welder

is that solderer is a person who solders, or tool that is used to solder while welder is one who welds, or unites pieces of iron, etc, by welding.

As nouns the difference between welder and welding

is that welder is one who welds, or unites pieces of iron, etc, by welding while welding is the action or process of.

As a verb welding is

.

As nouns the difference between welder and welder

is that welder is one who welds, or unites pieces of iron, etc, by welding while welder is one who welds, or unites pieces of iron, etc, by welding.

As nouns the difference between welder and solder

is that welder is one who welds, or unites pieces of iron, etc., by welding while solder is any of various alloys, often of tin and lead, that are used to join small pieces of metal together.

As a verb solder is

to join with (or as if with) solder.