lift
Boost is a synonym for the word lift and starts with the letter B.
support, advocate, assist, boost
applaud, boost, brighten, cheer
improve, better, increase, lift, boost, reinforce
expansion, increase, growth, jump, boost, upsurge
support, help, boost, strengthen, reinforce, shore up, augment
enhance, develop, improve, boost, supplement, refine, heighten, augment
improve, better, increase, lift, boost, reinforce
approve, acclaim, recommend, accredit, boost, compliment, sanction, support, endorse, assign, trust
add to, back up, beef up, bolster, boost, build up, buttress, carry, emphasize, energize, enlarge, etc.
accent , boost, aggravate, enhance, severe
access, accession, accumulation, augmentation, boost, breakthrough,development,exaggeration,expansion,extension,gain,increment,raise,rise,spread,surge.swell upgrade,