Hypernym for "day", "month", "week", "year"
I would like to know if there is a single-word hypernym for day, month, week and year.
Solution 1:
Time period is general enough:
time period n. an amount of time
Solution 2:
Their hypernym would be based in their singular aspect of similarity — into what set can they all fit. So words like time and span (or even time span) would do the trick assuming you mean a duration. If you mean a specific period then try, um, period.