Verified answer

1 account

2 act

3 nation

4 action

5 ammunition

6 amount

7 an

8 ant

9 at

10 on

11 onion

12 atom

13 atomic

14 auction

15 aunt

16 auto

17 can

18 cocoa

19 cat

20 caution

21 coconut

22 coin

23 comic

24 comma

25 coma

26 count

27 cut

28 icon

29 inn

30 main

31 man

32 mat

33 mint

34 moan

35 mount

36 mountain

37 no

38 noon

39 nun

40 nut

41 tan

42 tin

43 to

44 tonic

45 toucan

46 tuna

47 tunic

48 union

49 unit

50 common