膨大【ぼうだい】
huge, vast, enormous, colossal, extensive, large, swelling, expansion
膨張【ぼうちょう】
expansion, swelling, increase, growth
膨れる【ふくれる】
to swell (out), to expand, to be inflated, to distend, to bulge, to get cross, to get sulky, to pout
膨らむ【ふくらむ】
to expand, to swell (out), to get big, to become inflated
膨らます【ふくらます】
to swell, to expand, to inflate, to bulge