Last letter = First Letter, min 3 syllable word chain

rational

lymphoma

Argentine

euphoria

amnesiac

Championship

propreantepenultimate

it’s the one before the one before the one before the one before the last one

Excalibur

rigatoni

Icelandic

calamari

incandescent

tenacity

yesteryear

reminiscing

gubernatorial

limited

Democratic

Contralto

operation