We should probably think of:
F- fraternity, faint ,feeble,faint
V- vacancy, vigorous ,vanish, vulgur
A- aggressive, arrogant
K- kainotophobia, kakistocracy ,kakorrhaphiophobia
T- tremble, tiring , tickle
S- shiver , shine , shake
D- discriminate , dump ,dashing
centrifuge
forehead
Including the letters d, b, f, the longest word might be defibrillation.
"LANDFORMS"
An English word containing the letters 'a ,b ,c ,d ,e , and f is 'Fabricated' .
The letters "ou" make the "f" sound in the word "rough."
Just f makes the ffff sound, the other letters make up the first part of the word.
The missing letters F and C make the word deflects.
decaf
You can make the word defers using all of the letters.Other words that you can make using some of the letters are:DeersDeferFeedsFreedFreesReedsReefsRefedSederDreeFreeSeedSeer
be
folded toddle