It is one of two or more words or expressions of the same language that have the same or nearly the same meaning in some or all senses.
Labourer:
A laborer (or labourer) is a person who works in manual labor types, especially in the construction and factory industries' workforce. Laborers are in a class of wage-earners in which their only possession of significant material value is their labor.
They are the basic pillar in the country development and have a huge impact over the economy of the nation.