Last letter = First Letter, min 3 syllable word chain

epileptic

craziness

sensuous

seriousness

sensibilities

sarcoidosis

-“BB”-

sarcophagus

streptococcus

succubus

sassafras

silliness

sanctimonious

sinuous

sacraments

stuffiness

Sagittarius

sunnysides

silversides

a type of small fish; also the name of a WWII submarine (SS-236) currently on display as a museum ship in Muskegon, MI

-“BB”-

sunglasses

stanniferous