reminder

nouns

a message that helps you remember something
"he ignored his wife's reminders"
reminder
is derived from
remind
is a type of (narrower)
what a communication that is about something is about
content, message, subject matter, substance
an experience that causes you to remember something
reminder
is derived from
remind
is a type of (narrower)
the content of direct observation or participation in an event
"he had a religious experience"; "he recalled the experience vividly"
experience
someone who gives a warning so that a mistake can be avoided
admonisher, monitor, reminder