Antonyms of adj imperishable

2 senses of imperishable

Sense 1
imperishable (vs. perishable) -- (not perishable)

perishable (vs. imperishable) -- (liable to perish; subject to destruction or death or decay; "this minute and perishable planet"; "perishable foods such as butter and fruit")
        => biodegradable -- (capable of being decomposed by e.g. bacteria; "a biodegradable detergent")
        => decayable, putrescible, putrefiable, spoilable -- (liable to decay or spoil or become putrid)

Sense 2
abiding, enduring, imperishable -- (unceasing; "an abiding belief"; "imperishable truths")

INDIRECT (VIA permanent) -> impermanent, temporary -- (not permanent; not lasting; "politics is an impermanent factor of life"- James Thurber; "impermanent palm cottages"; "a temperary arrangement"; "temporary housing")

Similarity of adj imperishable

2 senses of imperishable

Sense 1
imperishable (vs. perishable) -- (not perishable)
       => durable, indestructible, perdurable, undestroyable -- (very long lasting; "less durable rocks were gradually worn away to form valleys"; "the perdurable granite of the ancient Appalachian spine of the continent")
       => imputrescible -- (not subject to decay)

Sense 2
abiding, enduring, imperishable -- (unceasing; "an abiding belief"; "imperishable truths")
       => permanent (vs. impermanent), lasting -- (continuing or enduring without marked change in status or condition or place; "permanent secretary to the president"; "permanent address"; "literature of permanent value")