Group 1

 

play

way

stay

today

says

boy

toy

enjoy

annoy

royal

 

Group 2

 

camel

tunnel

squirrel

travel

towel

tinsel

bagel

hazel

vowel

jewel

 

Group 3

 

happily

angrily

lazily

easily

busily

greedily

messily

wearily

cheekily

clumsily