“FIXATIF” is a valid word. — 20 points Scrabble

fixit
affixa linguistic element added to a word to produce an inflected or derived form

taxia car driven by a person whose job is to take passengers where they want to go in exchange for money
fiata legally binding command or decision entered on the court record (as if issued by a court or judge)
tiffa quarrel about petty points
fixt
ixiaa monocotyledonous genus of the family Iridaceae

fixinformal terms for a difficult situation
fata soft greasy substance occurring in organic tissue and consisting of a mixture of lipids (mostly triglycerides)
fita display of bad temper
taxcharge against a citizen's person or property or activity for the support of government
faxduplicator that transmits the copy by wire or radio
aft(nautical, aeronautical) situated at or toward the stern or tail
aff
iff
ait

itthe branch of engineering that deals with the use of computers and telecommunications to retrieve and store and transmit information
if
ata highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
taa hard grey lustrous metallic element that is highly resistant to corrosion; occurs in niobite and fergusonite and tantalite
aian agency of the United States Army responsible for providing timely and relevant and accurate and synchronized intelligence to tactical and operational and strategic level commanders
fathe syllable naming the fourth (subdominant) note of the diatonic scale in solmization
axan edge tool with a heavy bladed head mounted across a handle
xithe cardinal number that is the sum of ten and one
tia light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite

FIXATIF