Last letter = First Letter, min 3 syllable word chain

Neanderthal

lollygag

gabagool

gorilla

Agnosticism

mumbo-jumbo

originalism

micrometer

-“BB”-

rhapsodical

luminaria

alligator

rotisserie

embarrassing

gladhanding

Grenadine

economical

Lauberhof

Frankenstein

nonbelief

Forensic

-“BB”-