SECUNDUM is a playable word

secundum Scrabble® Dictionary

adverb
according to
84 Playable Words can be made from "SECUNDUM"
   2-Letter Words (12 found)
   3-Letter Words (27 found)
   5-Letter Words (13 found)
   6-Letter Words (4 found)
   7-Letter Words (1 found)
   8-Letter Words (1 found)