Businesslike, bloodthirstiness and bibliographically are big words.
zoroastrian
questionableness
How about "kaleidoscopic"? Kinesthesiologist.
Big is an adjective. Words that modify adjectives are called adverbs. Really is an adverb that can modify big.
good-looking, graceful, gorgeous
Beautiful, believable, big-hearted, brainy, bright, brave and brilliant are positive words. They begin with the letter b.
tennis
Beech.
waspxyleborus (a big bark beetle),
· unpredictable
Outstanding, optimistic and outgoing are positive descriptive words. They begin with the letter o.
Big dipper and black holes are space words. They begin with the letter b.