Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun hobbyhorse

2 senses of hobbyhorse

Sense 1
hobbyhorse -- (a topic to which one constantly reverts; "don't get him started on his hobbyhorse")
       => preoccupation -- (an idea that preoccupies the mind and holds the attention)

Sense 2
hobby, hobbyhorse, rocking horse -- (a child's plaything consisting of an imitation horse mounted on rockers; the child straddles it and pretends to ride)
       => plaything, toy -- (an artifact designed to be played with)