INTERFERON Scrabble 13 Words With Friends 15 Scrabble letter values: I1N1T1E1R1F4E1R1O1N1 = 13 Definition noun an antiviral protein produced by cells that have been invaded by a virus. Examples “inhibits replication of the virus” See all 202 words you can make from INTERFERON → 10-letter words Words starting with I Words ending with N ← Unscramble different letters