1.   fossils

2.   energy

3.   hydro

4.   round

5.   dark

6.   ball

7.   girl

8.   downspout

9.   outhouse

10.                     past

11.                     enough

12.                     though

13.                     brought

14.                     tough

15.                     cough

16.                     handlebars

17.                     barnyard

18.                     outsmart

19.                     whirlwind

20.                     soup

1.   stop

2.   am

3.   whether

4.   fine

5.   half

6.   could

7.   great

8.   watch

9.   which

10.                     thank

11.                     talk

12.                     blink

13.                     weather

14.                     grate

15.                     dunk

16.                     witch

17.                     bridge

18.                     change

19.                     catch

20.                     much

1.   class

2.   piece

3.   surface

4.   river

5.   common

6.   berry

7.   monarch

8.   trace

9.   nicely

10.                     picnic

11.                     question

12.                     ankle

13.                     except

14.                     certain

15.                     niece

16.                     calf

17.                     hooves

18.                     source

19.                     temperature

20.                     technology