Last letter = First Letter, min 3 syllable word chain

octogenarian

nonagenarian

necromancer

regurgitate

esophagus

syllogism

metaphorical

-“BB”-

lagomorph

hippogriff

fungicide

echidna

antecedent

tumbleweed

daibutsu

Ubangi

Imhotep

Pyrenees

sanctimoniously

Yellowcake

a type of uranium concentrate powder obtained from leach solutions. It is an intermediate step in the processing of uranium after it has been mined, but before fuel fabrication or uranium enrichment.

-“BB”-

elimination