PARALLELLING is a playable word

parallel Scrabble® Dictionary

verb
paralleled, paralleling, parallels or parallelled, parallelling, parallels
to be similar or analogous to
405 Playable Words can be made from "PARALLELLING"
   2-Letter Words (20 found)
   9-Letter Words (1 found)
   11-Letter Words (1 found)
   12-Letter Words (1 found)