Four poems; A, B, C, & D: written with only using words that only begin with the letters A, then B, then C, and then D...
A
Any amount acquired accordingly admits
an amazing abundance accumulating
accordingly accounts admit assurance
aside Andy awaits another accountant
Another analogy accumulates aimlessly aimed
at anyone anywhere about almost anything at all
as abundant as any assayer accurate assessments
additional accounts approved anonymous additions anyway
All accounts admitted any and all acclamations
accumulated accordingly adrift anywhere at all
always answered assumptions assumed
Andy answered assured as anyone assuming anonymity
B
better be bitter brave brother because bitter's best
bland broken bad babbling bestows better
black bleakness befriend buttered buttons
bluntly bland because better better be better
back boards break because bogus boogies
beacon blissful bounties borrowed begrudgingly
because backwards boons broke bleak blokes
begging bewildered beside borrowed burrows
bounty bleak because backside broken balls
bounce blatantly bobbing boyish boobies
bleak beach black bland budget basements
being because beaches brace brunches bravely