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It can be one word and two words it just depends on how you are using it. As a noun it is one word. If "flow" acts as a verb (for example, "the work flows well"), use two words.
work site Two words
The term "workflow" is typically written as one word.
"Work time" is written as two words.
one word
"Homework" is typically written as one word.
Work site, two words.
It's one word.One word as an adjective; two words as a noun
It is the "Deuce," which means the two (2) days off you get from work after you finish each week. :)
"Workstation" is typically written as one word.
"Test work" is typically written as two separate words.
It is the letter "e". The word day has no "e" in it, the word week has two, the word year has one "e" in it, and the word decade has two in it.