1) Aware 2) French word used in English 3) Good at remembering 4) Having a good memory 5) Holding 6) Long 7) Mindful 8) Recollective 9) Retaining 10) Tenacious 11) Tending to retain 1) Holding 2) Recollective 3) Retaining 
• (n.) That which retains or confines; a restraint. • (a.) Having power to retain; as, a retentive memory.
Re·ten'tive adjective [ Confer French rétentif .] Having power to retain; as, a retentive memory. « Nor airless dungeon, nor strong links of iron, Can be retentive to the strength of spirit.» Shak. 
[adj] - tending to retain
recollective adjective good at remembering; `a retentive mind`; `tenacious memory`
[Intelligent words] good at remembering