"retentions" in the noun sense
1. retention, keeping, holding
the act of retaining something
2. memory, retention, retentiveness, retentivity
the power of retaining and recalling past experience
"he had a good memory when he was younger"
3. retentiveness, retentivity, retention
the power of retaining liquid
"moisture retentivity of soil"
Source: WordNet® (An amazing lexical database of English)
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