Last letter = First Letter, min 3 syllable word chain

deficient

triathlon

Nefertari

Neanderthal

lithiate

trivia: the original name of 7-up was “Bib-Label Lithiated Lemon-Lime Soda”. The ‘lithiated’ in the name referred to lithium citrate, a compound used to treat patients with mental health problems, in the beverage’s formulation.

-“BB”-

Excelsior

ravenous

succulent

testicular

randiness

sentient

tangential

leitmotif

Fidelio

oleomargarine

epipharynx

xylopyrography

a fancy word for doing this (see below ▼), specifically on wood as opposed to leather or other materials

-“BB”-

yellowing

geography

yodeler