Instead and Also

adverb

• 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

• (adv.) In the place or room; -- usually followed by of.
• (adv.) Equivalent; equal to; -- usually with of.

adverb

• In addition.
  • usage: "he has a Mercedes, too"
  • synonyms: besides, too, likewise, as well

• (adv.&conj.) In addition; besides; as well; further; too.
• (adv.&conj.) Even as; as; so.
• (adv.&conj.) In like manner; likewise.