This word is acceptable for play in the UK dictionary that is being used in the following games:

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adj. commemorative

adj. Commemorative.

Of or pertaining to memory: as, the memorative faculty or power.

Preserving or recalling the memory of something; aiding the memory.

"Suppose it be of a thing that is white; when the present sense of it is vanished, there is yet retained the remembrance; when many memorative notions of the same similitude do concur, then he is said to have an experience; for experience is nothing more than the abundance of notions that are of the same form met together."

commemorative