Last letter = First Letter, min 3 syllable word chain

yackety-yack

kaleidoscopical

lackadaisical

laboriousnesses

splendiferous

synecdoche

easternizations

syncope

European

nincompoop

pneumonoultramicroscopicsilicovolcanoconiosis

supercalifragilisticexpialidocious

seaworthiness

supercilious

supersymmetrical

latitudinal

lautenclavicymbel

logarithm

minicab

boysenberry