【Remembrance】 ,  【remembrancer】 ,  【reminder】 ,  【memorial】 ,  【memento】 ,  【token】 ,  【keepsake】 ,  【souvenir】  denote something that serves to keep a person or thing in mind.

【Remembrance】  and the less common  【remembrancer】 are applied to an object which causes one to call back to mind someone or something, especially someone dead or far away or an event or occurrence of the past, often the distant past.

【Reminder】 suggests something (as a memorandum) that keeps one from forgetting; the term need not suggest a wish to remember.

【Memorial】 suggests a wish or desire to preserve the memory of something (as a person or event) and therefore applies to a 【reminder】 (as a building, a monument, an endowment, or an observance) that is of a kind fitted to endure.

The remaining words more consistently suggest a personal association between the thing intended as a 【remembrance】 or 【reminder】 and the person, experience, or place to be remembered.

【Memento】 typically applies to something small or trivial kept to satisfy a desire to renew the 【remembrance】 of some past interest; often the word suggests that the thing itself has no longer any value.

【Token】 often refers to something treasured as a 【memento】 , but it usually denotes a gift presented to one as a sign of affection, esteem, or regret at parting.

【Keepsake】  represents the attitude of the receiver rather than of the giver; otherwise it differs little in general use from  【token】  and  【memento】 .

But 【keepsake】 may apply specifically to a giftbook, often one made up for a particular group or occasion or as a specimen of fine printing.

【Souvenir】  (see also MEMORY ) usually implies a material 【reminder】 not necessarily given nor received that remains or is kept as a 【memento】 (as of a place visited or of an experience worthy of 【remembrance】 ).