Last letter = First Letter, min 3 syllable word chain

Thanatopsis

sirocco

overwhelming

garrulous

gynotikolobomassophile

ecumenical

Lysistrata

agoraphobia

arachibutyrophobia

antimatter

regurgitating

genuflect

transubstantiation

neonatal

leonine

everlasting

gregarious

scapulomancy

yellow-bellied

(I know, that’s kinda two words. Sue me.)

departmentalization