21-letter word
buckminsterfullerenes
Kennethrobertofitzwaterayjameseepatriciacashiichelsayybrianaeasthamaiecaittlinapaigerboothean.
supercalifragilisticexpialidocious.
methionylglutaminylarginyltyrosylglutamylseryllleucylpheny
One very long word that starts with m is: microcryptocrystalline (22 letters)
Bellybuttons would be the longest word I can think of beginning with a 'b' and ending in an 's'.
The longest word that starts with q is quintoplets!!!What about Quartermasterships?
14-letter wordsbourgeoisified, bureaucratised, bureaucratized, butterfingered
The longest word starting with B is: brachopsedo pnemonoultra microscopics ilicovolcano coniosis (the word has no spaces but the whole word will not appear unless it is broken into pieces).
methionylglutaminylarginyltyrosylglutamylseryllleucylpheny
Kennethrobertofitzwaterayjameseepatriciacashiichelsayybrianaeasthamaiecaittlinapaigerboothean.
supercalifragilisticexpialidocious.
Lymphadenopathy
Volcaneclopecsupernueropticdertyuklnmugunhumbun.
The word 'boom' can be used as a word for explosion that starts with a b.
One very long word that starts with m is: microcryptocrystalline (22 letters)
The longest word that starts with an "s" and ends with an "r" is "supercomputer."
Bellybuttons would be the longest word I can think of beginning with a 'b' and ending in an 's'.