Replace and Instead

replace

Substitute a person or thing for (another that is broken or inefficient or lost or no longer working or yielding what is expected. )
- usage: "He replaced the old razor blade"; "We need to replace the secretary that left a month ago"; "the insurance will replace the lost income"; "This antique vase can never be replaced"
Take the place or move into the position of.
- usage: "Smith replaced Miller as CEO after Miller left"; "the computer has supplanted the slide rule"; "Mary replaced Susan as the team's captain and the highest-ranked player in the school"
- synonyms: supplant, supersede, supervene upon, supercede
Put something back where it belongs.
- usage: "replace the book on the shelf after you have finished reading it"; "please put the clean dishes back in the cabinet when you have washed them"
- synonyms: put back
Put in the place of another; switch seemingly equivalent items.
- usage: "the con artist replaced the original with a fake Rembrandt"; "substitute regular milk with fat-free milk"; "synonyms can be interchanged without a changing the context's meaning"
- synonyms: substitute, interchange, exchange

(v.t.) To put in a new or different place.
(v.t.) To place again; to restore to a former place, position, condition or the like.
(v.t.) To take the place of; to supply the want of; to fulfull the end or office of.
(v.t.) To supply or substitute an equivalent for; as, to replace a lost document.
(v.t.) To refund; to repay; to restore; as, to replace a sum of money borrowed.

Webster's Revised Unabridged Dictionary

instead

In place of, or as an alternative to.
- usage: "Felix became a herpetologist instead"; "alternatively we could buy a used car"
- synonyms: alternatively, or else
On the contrary.
- usage: "rather than disappoint the children, he did two quick tricks before he left"; "he didn't call; rather (or instead), he wrote her a letter"; "used English terms instead of Latin ones"
- synonyms: rather

Webster's Revised Unabridged Dictionary