In the February 1971 issue of Word Ways, Mary J. Youngquist pointed out that when element symbols are expanded, SATED becomes SULFURATED and FEY becomes IRONY.

That August, she, Philip Cohen, and Murray Pearce extended the list:

FEED = IRONED
AGED = SILVERED
SIC = SULFURIC
SNED = TINED
SNY = TINY
SOUS = SULFUROUS
SET = SULFURET
SING = SULFURING
SIZING = SULFURIZING
CUED = COPPERED

Likewise, BASIS yields BASILICONS, NAZI yields NEONAZI (and then NEONEONEONAZI, and so on forever), and RES can yield either RHENIUMS or RESULFUR.