period — a rather large interval of time that is meaningful in the life of a person, in history, etc., because of its particular characteristics: a period of illness; a period of great profitability for a company; a period of social unrest in Germany.
age — Your age is the number of years that you have lived.
time — the system of those sequential relations that any event has to any other, as past, present, or future; indefinite and continuous duration regarded as that in which events succeed one another.
eon — An indefinite and very long period of time, often a period exaggerated for humorous or rhetorical effect.
date — A date is a specific time that can be named, for example a particular day or a particular year.
span — the act of causing a spinning or whirling motion.
