Curious which words (>3 letters) in your system dictionary have all the letters in alphabetical order? Sate your curiosity with a little #awk:

$ awk 'length>3 && /^a*b*c*d*e*f*g*h*i*j*k*l*m*n*o*p*q*r*s*t*u*v*w*x*y*z*$/' /usr/share/dict/words

Optionally sort they by length:

$ awk 'length>3 && /^a*b*c*d*e*f*g*h*i*j*k*l*m*n*o*p*q*r*s*t*u*v*w*x*y*z*$/{print length, $0}' /usr/share/dict/words | sort -n

give me "billowy" and "beefily" as words of interest. If you don't like duplicates, use "?" instead of "*"

$ awk 'length>3 && /^a?b?c?d?e?f?g?h?i?j?k?l?m?n?o?p?q?r?s?t?u?v?w?x?y?z?$/{print length, $0}' /usr/share/dict/words | sort -n

which gives "almost", "biopsy", and "chintz" as nice long runs.