Some people claim that working hours for labours in factories are too long.
In English a labourer ('labour' + 'er') does work that distinguishes him or her from other kinds of worker:
Factory work involves a certain amount of skill, and cannot be referred to as labour.Here are some pictures of labourers.
If you are looking for the right synonym for worker then first of all consider:
These considerations will lead you to a more apprpriate label for the work you are referring to. In IELTS a more appropriate label will get you a higher score for Lexical Resource (vocabulary).
Labourer - the person (countable)
Labour - noun (uncountable, abstract) Can mean:
Labour - verb
Laborious - adjective (Even skilled work can be 'laborious', especially if it requires physical effort or is repetitive).
Hard labour - A form of punishment used by tyrannical governments, often for political prisoners. If my work feels like hard labour, it's very hard work!
(to be) + in labour - Giving birth!
Labour over something - Work extra hard at a task.