fathom vs. fthm
fathom vs. sound
fathom vs. penetrate
femtometer vs. femtometre
femtometer vs. fermi
florin vs. guilder
fistful vs. handful
former vs. other
former vs. old
former vs. late
forthcomingness vs. imminence
flatulency vs. gas
famishment vs. starvation
flu vs. influenza
frambesia vs. yaws
framboesia vs. yaws
fester vs. maturate
fester vs. suppurate
fascioliasis vs. fasciolosis
flawlessness vs. perfection
fuddle vs. jumble
fuddle vs. throw
fluoroform vs. trifluoromethane
fluorite vs. fluorspar
fluor vs. fluorite
fulminate vs. rail
formalin vs. formol
feces vs. stool
faeces vs. stool
fiberglass vs. fibreglass
fibril vs. strand
filtrate vs. strain
fertiliser vs. fertilizer
formaldehyde vs. methanal
frankincense vs. thus
fructose vs. levulose
fructose vs. laevulose
furan vs. furane
furan vs. furfuran
furfural vs. furfuraldehyde
feldspar vs. felspar
fibrinolysin vs. plasmin
fluorescein vs. fluoresceine
fluorescein vs. resorcinolphthalein
fetoprotein vs. foetoprotein
flaxseed vs. linseed
forenoon vs. morn
freshen vs. refresh
fecundate vs. inseminate
fecundate vs. fertilize
fecundate vs. fertilise
fertilize vs. inseminate
fertilise vs. inseminate
fructify vs. set
fictionalize vs. novelize
fictionalize vs. novelise
fictionalize vs. retell
fictionalise vs. novelize
fictionalise vs. novelise
fictionalise vs. retell
follow vs. trace
follow vs. pursue
follow vs. survey
follow vs. succeed
follow vs. watch
follow vs. postdate
fail vs. slip
fail vs. miscarry
fail vs. neglect
fortify vs. strengthen
fortify vs. lace
fluoridate vs. fluoridise
fluoridate vs. fluoridize
falsify vs. warp
fluctuate vs. waver
focalize vs. localize
focalize vs. localise
focalise vs. localize
focalise vs. localise
foredate vs. predate
fancify vs. prettify
fasten vs. tighten
festinate vs. hurry
finalize vs. settle
finalise vs. settle
facilitate vs. help
forget vs. leave
foreordain vs. predestine
foreordain vs. predestinate
forbid vs. veto
forbid vs. foreclose
forbid vs. forestall
forbid vs. preclude
forbid vs. prevent
forswear vs. resile
flout vs. scoff
feign vs. sham
formulate vs. phrase
forewarn vs. previse
foretell vs. herald
fend vs. stand
fulfill vs. meet
fulfill vs. satisfy
fulfil vs. meet
fulfil vs. satisfy
famish vs. starve
famish vs. hunger
fress vs. gluttonize
fress vs. gluttonise
fatten vs. plump
flay vs. skin
flog vs. whip
flump vs. plop
fabricate vs. manufacture
frustrate vs. torment
frustrate vs. spoil
fascinate vs. grip
fascinate vs. intrigue
footslog vs. plod
foreswear vs. renounce
foreswear vs. relinquish
filch vs. pinch
forego vs. relinquish
forego vs. predate
furnish vs. supply
forgo vs. relinquish
forgo vs. predate
forgather vs. gather
foregather vs. gather
formalise vs. validate
formalize vs. validate
frivol vs. trifle
footle vs. tarry
finagle vs. wangle
gravely vs. severely
gravely vs. soberly
gravely vs. staidly
good vs. well
good vs. thoroughly
good vs. sound
good vs. unspoiled
good vs. honest
good vs. salutary
good vs. serious
good vs. right
good vs. just
good vs. practiced
good vs. safe
good vs. goodness
genuinely vs. truly
generally vs. mostly
generally vs. loosely
gently vs. gradually
globally vs. internationally
gratifyingly vs. satisfyingly
gracefully vs. graciously
gracelessly vs. ungraciously
gracelessly vs. ungracefully
gracelessly vs. woodenly
gently vs. lightly
gently vs. mildly
gratefully vs. thankfully
generously vs. liberally
glibly vs. slickly
gratis vs. volunteer
gratis vs. unpaid
gorgeously vs. magnificently
gratingly vs. raspingly
gratingly vs. harshly
gregariously vs. sociably
grayly vs. greyly
grotesquely vs. monstrously
gamely vs. pluckily
garishly vs. tawdrily
garishly vs. gaudily
gibingly vs. mockingly
gladly vs. willingly
gleefully vs. joyously
gleefully vs. joyfully
garrulously vs. loquaciously
grandiloquently vs. magniloquently
gainlessly vs. unprofitably
grabby vs. greedy
grasping vs. greedy
greedy vs. prehensile
given vs. granted
given vs. presumption
gooey vs. icky
gummed vs. gummy
gluey vs. sticky
glutinous vs. sticky
gummy vs. sticky
galling vs. plaguey
guilty vs. hangdog
glued vs. pasted
glossy vs. showy
glistening vs. glossy
glossy vs. lustrous