retentive Synonyms

tenacious recollective long airproof air-proof longest gas-tight airtight gripping waterproof tough tight dampproof elephantlike easy-to-remember easily remembered than words easily recalled easily memorized easily memorised easily recollected pressure-tight backed by gas proof air-locked enclosed fluid retentive stubborn steadfast faithful evocative dogged containment cohesive clingy clinging aware air-tight acquisitive gastight good retention retaining resolute persistent mindful longer keeping impermeable holding grasping