The letters spell the word flintlock. The word uses all nine letters.
isinf as in isinf C++
Using all the letters, nothing
caked
acmek
The word jackals can be made from those letters.
I cannot answer this question.
COST
Using all the letters you get couches
Taxi
catcher
The word is hoof.
cadetcaratchantchartcheatchestcleatcoastcometcountcourtcraftcreptcrestcrustcrypt