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

See also: dependable, reliable

• flimsy
• flinch
• flinders
• Flindersia
• Flindersia australis
• Flindersia schottiana
• flindosa
• flindosy
• fling
• fling off
• flint
• flint corn
• flint glass
• flint maize
• Flint River
• flinthead
• flintlock
• flintstone
• flinty
• flip
• flip chart
• flip one's lid
• flip one's wig
• flip out
• flip over