Last letter = First Letter, min 3 syllable word chain

amnesia

adventurous

superstitious

swimmingly

Yackety-yak

Kamchatka

Aventine

eviscerated

Democratic

catastrophic

Collington

neurotic

catechism

Mesopotamia

accelerate

-“BB”-

echolocation

Nausicaan

Niagara

Argentinian

Nigeria