sometime, sometimes, some time
sometime: adverb meaning at some indefinite time:
I'll be there sometime.
Sometime is not hyphenated in compound modifiers.
sometimes: adverb meaning occasionally:
Sometimes articles editors disagree with the editorial Style Manual.
some time: adverbial phrase meaning an interval:
He left some time ago
the Style Manual has been under revision for some time.
See also: someday, some day.