BUILDING BLOCKS I
Credit: GAMES Magazine - Oct. 1986
A. Braine

The last three letters in each line of this puzzle are already in place. To solve, insert the "blocks" below onto the remaining blanks - without re-arranging any letters - to complete eight nine-letter words reading across. Each of the blocks will be used exactly once. When all the blanks have been filled in, two of the columns reading down will spell a pair of additional, related words.

ANO     ATH     BAD     DEC     ETI      FOR     IDE     KIL
MIN     NUR     NYM     SEM    SOM   TAX     TNI     UNS

_ _ _  _ _ _  TON
_ _ _  _ _ _  RMY
_ _ _  _ _ _  AID
_ _ _  _ _ _  GHT
_ _ _  _ _ _  LON
_ _ _  _ _ _  LED
_ _ _  _ _ _  MES
_ _ _  _ _ _  OUS

Answers:

BADMINTON
TAXIDERMY
NURSEMAID
FORTNIGHT
DECATHLON
UNSKILLED
SOMETIMES
ANONYMOUS

The fourth and fifth columns, reading down, spell 
MISTAKEN IDENTITY