Solution: First thing to do is start identifying some of the pictures. Each can be identified by a single word, and many of the words will be very similar to each other. The 12 words are:

REWARD
BRING
MINE
WRING
SNIT
MINI
SUIT
HEARER
FASTEN
REWORD
FATTEN
HEADER


The 12 pictures can be put in pairs where one picture name can be changed to another by changing only one letter. The 6 pairs are as follows:

rewArd --> rewOrd
sNit --> sUit
faSten --> faTten
Wring --> Bring
minE --> minI
heaRer --> heaDer


The 6 pairs can be arranged (as above) so that the six letters in the left column spell ANSWER. The other column of letters, put in this order, spell out the answer, OUTBID.