1. Tested and proved to be reliable
   - tested, tried, tried and true

See also: dependable, reliable

• labour movement
• labour of love
• labour organiser
• labour organizer
• labour pain
• labour pains
• labour party
• labour pool
• labour resources
• labour union
• labour-intensive
• laboured
• labourer
• labouring
• Labourite
• laboursaving
• Labrador
• Labrador Peninsula
• Labrador retriever
• Labrador Sea
• Labrador tea
• Labrador-Ungava Peninsula
• labradorite
• labret
• Labridae