Mankind is made of 2 words: Mank and ind.
If the longest word in history is pneumonoultramicroscopicsilicovolcanoconiosis, then it's big cousin would [be] something longer, right?
Nope, something way longer:
BEHO-methionylthreonylthreonylglutaminylalanylprolylthreonylphenylalanylthreonylglutaminylprolylleucylglutaminylserylvalylvalylvalylleucylglutamylglycylserylthreonylalanylthreonylphenylalanylglutamylalanylhistidylisoleucylserylglycylphenylalanylprolylvalylprolylglutamylvalylseryltryptophylphenylalanylarginylaspartylglycylglutaminylvalylisoleucylserylthreonylserylthreonylleucylprolylglycylvalylglutaminylisoleucylserylphenylalanylserylaspartylglycylarginylalanyllysylleucylthreonylisoleucylprolylalanylvalylthreonyllysylalanylasparaginylserylglycylarginyltyrosylserylleucyllysylalanylthreonylasparaginylglycylserylglycylglutaminylalanylthreonylserylthreonylalanylglutamylleucylleucylvalyllysylalanylglutamylthreonylalanylprolylprolylasparaginylphenylalanylvalylglutaminylarginylleucylglutaminylserylmethionylthreonylvalylarginylglutaminylglycylserylglutaminylvalylarginylleucylglutaminylvalylarginylvalylthreonylglycylisoleucylprolylasparaginylprolylvalylvalyllysylphenylalanyltyrosylarginylaspartylglycylalanylglutamylisoleucylglutaminylserylserylleucylaspartylphenylalanylglutaminylisoleucylserylglutaminylglutamylglycylaspartylleucyltyrosylserylleucylleucylisoleucylalanylglutamylalanyltyrosylprolylglutamylaspartylserylglycylthreonyltyrosylserylvalylasparaginylalanylthreonylasparaginylserylvalylglycylarginylalanylthreonylserylthreonylalanylglutamylleucylleucylvalylglutaminylglycylglutamylglutamylglutamylvalylprolylalanyllysyllysylthreonyllysylthreonylisoleucylvalylserylthreonylalanylglutaminylisoleucylserylglutamylserylarginylglutaminylthreonylarginylisoleucylglutamyllysyllysylisoleucylglutamylalanylhistidylphenylalanylaspartylalanylarginylserylisoleucylalanylthreonylvalylglutamylmethionylvalylisoleucylaspartylglycylalanylalanylglycylglutaminylglutaminylleucylprolylhistidyllysylthreonylprolylprolylarginylisoleucylprolylprolyllysylprolyllysylserylarginylserylprolylthreonylprolylprolylserylisoleucylalanylalanyllysylalanylglutaminylleucylalanylarginylglutaminylglutaminylserylprolylserylprolylisoleucylarginylhistidylserylprolylserylprolylvalylarginylhistidylvalylarginylalanylprolylthreonylprolylserylprolylvalylarginylserylvalylserylprolylalanylalanylarginylisoleucylserylthreonylserylprolylisoleucylarginylserylvalylarginylserylprolylleucylleucylmethionylarginyllysylthreonylglutaminylalanylserylthreonylvalylalanylthreonylglycylprolylglutamylvalylprolylprolylprolyltryptophyllysylglutaminylglutamylglycyltyrosylvalylalanylserylserylserylglutamylalanylglutamylmethionylarginylglutamylthreonylthreonylleucylthreonylthreonylserylthreonylglutaminylisoleucylarginylthreonylglutamylglutamylarginyltryptophylglutamylglycylarginyltyrosylglycylvalylglutaminylglutamylglutaminylvalylthreonylisoleucylserylglycylalanylalanylglycylalanylalanylalanylserylvalylserylalanylserylalanylseryltyrosylalanylalanylglutamylalanylvalylalanylthreonylglycylalanyllysylglutamylvalyllysylglutaminylaspartylalanylaspartyllysylserylalanylalanylvalylalanylthreonylvalylvalylalanylalanylvalylaspartylmethionylalanylarginylvalylarginylglutamylprolylvalylisoleucylserylalanylvalylglutamylglutaminylthreonylalanylglutaminylarginylthreonylthreonylthreonylthreonylalanylvalylhistidylisoleucylglutaminylprolylalanylglutaminylglutamylglutaminylvalylarginyllysylglutamylalanylglutamyllysylthreonylalanylvalylthreonyllysylvalylvalylvalylalanylalanylaspartyllysylalanyllysylglutamylglutaminylglutamylleucyllysylserylarginylthreonyllysylglutamylisoleucylisoleucylthreonylthreonyllysylglutaminylglutamylglutaminylmethionylhistidylvalylthreonylhistidylglutamylglutaminylisoleucylarginyllysylglutamylthreonylglutamyllysylthreonylphenylalanylvalylprolyllysylvalylvalylisoleucylserylalanylalanyllysylalanyllysylglutamylglutaminylglutamylthreonylarginylisoleucylserylglutamylglutamylisoleucylthreonyllysyllysylglutaminyllysylglutaminylvalylthreonylglutaminylglutamylalanylisoleucylmethionyllysylglutamylthreonylarginyllysylthreonylvalylvalylprolyllysylvalylisoleucylvalylalanylthreonylprolyllysylvalyllysylglutamylglutaminylaspartylleucylvalylserylarginylglycylarginylglutamylglycylisoleucylthreonylthreonyllysylarginylglutamylglutaminylvalylglutaminylisoleucylthreonylglutaminylglutamyllysylmethionylarginyllysylglutamylalanylglutamyllysylthreon