Separately and While

adverb

• Apart from others.
  • usage: "taken individually, the rooms were, in fact, square"; "the fine points are treated singly"
  • synonyms: individually, singly, severally, one by one, on an individual basis

noun

• A period of indeterminate length (usually short) marked by some action or condition.
  • usage: "he was here for a little while"; "I need to rest for a piece"; "a spell of good weather"; "a patch of bad weather"
  • synonyms: piece, spell, patch

• (v.t.) To cause to pass away pleasantly or without irksomeness or disgust; to spend or pass; -- usually followed by away.
• (n.) That which requires time; labor; pains.
• (conj.) During the time that; as long as; whilst; at the same time that; as, while I write, you sleep.
• (n.) Space of time or continued duration, especially when short; a time; as, one while we thought him innocent.
• (prep.) Until; till.
• (v.i.) To loiter.
• (conj.) Hence, under which circumstances; in which case; though; whereas.