1) Assayed 2) Battle-hardened 3) Checked 4) Checked out 5) Conducted a trial 6) Did a checking job 7) Did lab work 8) Did R & D work 9) Did work for Consumer Reports 10) Examined 11) Examined, tried 12) Gave a quiz 13) Gave a quiz to 14) Gave a whirl 15) Gave an exam 16) Gave an examination to 17) Known to be in working order 1) Assayed 2) Dependable 3) Experienced 4) Proved 5) Proven 6) Reliable 7) Sampled 8) Tried 
• (imp. & p. p.) of Test
[adj] - tested and proved useful or correct 2. [adj] - tested and proved to be reliable
time-tested adjective tested and proved to be reliable