Last letter = First Letter, min 3 syllable word chain

arthritis

syphilis

sassafras

somnambulant

-“BB”-

terrific

camisole

echoic

copacetic

carnivorous

saliferous

semaphore

Not sure what it means, but it’s on the front of emergency vehicles everywhere

-“BB”-

aspersions

silica

Ambulance

estrogen

nomenclature

euphoria

Asafoetida

-“BB”-

acrophobia