An act which allows one to accomplish a task more quickly.(noun)
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Use "timesaver" in a sentence
"If your Reader addiction feels more like a timesink than timesaver, it might be time to think about decluttering and reorganising your RSS feeds for a more efficient reading experience."
"However, as its network expands, it could be a real timesaver."
"Study cards, a digital version of the 3-by-5 index cards you used to spend hours making by hand, are a huge timesaver."