Uptime
6 lettersnounmoderateUpdated June 2026
Definition
The period during which a machine, system, or service is fully operational and available for use.
“The server achieved 99.9% uptime over the past year.”
Related Words
Synonyms
availabilityoperating time
Antonyms
downtime
Word Game Tips
🟩
Wordle
Contains TIME, the UP prefix is a strong opening cluster to test in Wordle
🔤
Scrabble
Worth 10 points, TIME is a reliable and familiar sub-word to build from
Words Related to Uptime
Words you can make from Uptime
Shorter words formed from the letters in “uptime”.
Explore Similar Words
Try These Tools
Dictionary References
Look up uptime in an authoritative dictionary for full definitions, pronunciation, and etymology.

Ready to test your word skills?
Download Word Challenge for unlimited word puzzles, a fresh Daily Challenge, and head-to-head multiplayer. Guess the hidden word in six tries or fewer!