Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun child's_play

2 senses of child's play

Sense 1
cinch, breeze, picnic, snap, duck soup, child's play, pushover, walkover, piece of cake -- (any undertaking that is easy to do; "marketing this product will be no picnic")
       => undertaking, project, task, labor -- (any piece of work that is undertaken or attempted; "he prepared for great undertakings")

Sense 2
play, child's play -- (activity by children that is guided more by imagination than by fixed rules; "Freud believed in the utility of play to a small child")
       => diversion, recreation -- (an activity that diverts or amuses or stimulates; "scuba diving is provided as a diversion for tourists"; "for recreation he wrote poetry and solved crossword puzzles"; "drug abuse is often regarded as a form of recreation")