retentive Synonyms

tenacious recollective long fluid retentive 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 memorious stubborn steadfast retention evocative dogged containment cohesive clingy clinging catching aware air-tight acquisitive absorbent faithful gastight retaining resolute persistent observational mindful longer keeping