Last letter = First Letter, min 3 syllable word chain

nuclear

rambunctious

sarcastic

curious

-“BB”-

staccatic

contractual

laminate

ecstatic

clandestine

embarrassment

tumescence

ECNALUBMA

I’m not sure just what it is, but it’s printed on the front of just about every ambulance on the road these days.

-“BB”-

My thinking mirrors yours.

In play:

adventurer

rebuttal

ladybug

gelatin

novocaine

elastic

consecutive

erroneous