i 1 n 1 t 1 e 1 r 1 c 3 h 4 a 1 n 1 g 2 e 1 a 1 b 3 l 1 e 1 n 1 e 1 s 1 s 1
19 letters · 27 points in Scrabble
Meaning
noun the quality of being capable of exchange or interchange
originFrom interchangeable + -ness.
Etymology from Wiktionary, CC BY-SA 3.0