1. What do the following words have in common?

LOG

COMB

TONIC

 

2. What do the following words have in common?

 

SMOTHER

SMIDGEON

STICKBALL

FANTASY

 

3. What do the following words have in common?

 

MAT

CHIN

HELD

QUIT

LAMB

SWAN

 

Answers:

 

1. Each word can be preceded by CATA:
    CATALOG

    CATABOMB

    CATATONIC

 

2. Each word conceals the name of an insect:

    sMOTHer

    sMIDGEon

    sTICKball

    fANTasy 

 

3. The last letter of each clue word can be changed to P to give new words:

     MAP

     CHIP

     HELP

     QUIP

     LAMP

     SWAP