What five-letter words can you find which have the structure:

 

 ?RAC? 

 ie the three letters in the middle are RAC, you just need to supply the two letters at the beginning and end.
There are sixteen in total and about half are common words.  (A big hint is that two of the answers are in the title of the quiz!)

 

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BRACE

to support [v BRACED, BRACING, BRACES]

BRACH

a female hunting hound, also BRACHET, BRATCHET [n BRACHES or BRACHS]

BRACK

a flaw in cloth [n -S]

BRACT

any reduced leaflike structure associated with a cone or flower [n -S]

CRACK

to break without dividing into parts [v -ED, -ING, -S]

DRACK

(Australian slang) of a woman, unattractive, also DRAC [adj]

DRACO

as in draco lizard, a flying lizard [adj]

FRACK

to engage in fracking for shale oil [v -ED, -ING, -S]

FRACT

to break; to violate [v -ED, -ING, -S]

GRACE

beauty [n -S] / to give beauty to [v GRACED or (obsolete) GRASTE, GRACING, GRACES]

ORACH

a plant of the goosefoot family, also ORACHE [n -ES]

ORACY

skill in oral communication [n ORACIES]

TRACE

to follow the course of [v TRACED, TRACING, TRACES]

TRACK

to follow the marks of an animal or vehicle [v -ED, -ING, -S]

TRACT

(Spenser) to trace, track [v -ED, -ING, -S]

WRACK

to wreck [v -ED, -ING, -S]