Solution of the Week #470 - Word List

They can all be followed by a pair of consecutive letters of the alphabet to form a six-letter word:

SCARAB     THOUGH     NAPALM     SOLEMN     TECHNO     DOLLOP     DIVERS     DIVEST     GALAXY

They are placed in order according to the letters that have been added.

Of the four words in the second list, one can also be followed by a pair of consecutive letters: PARA -> PARADE, and therefore belongs between SCAR and THOU in the list.

The other three could be followed by a pair of consecutive letters in reverse order: BECKON, CLEFTS, PASTED.