hobbyhorse

Words with a similar base: hobbyhorse

'hobbyhorse'

[hobbyhorse.n.01] as in: a topic to which one constantly reverts

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Examples:
don't get him started on his hobbyhorse

'hobbyhorse'

[hobby.n.02] as in: a child's plaything consisting of an imitation horse mounted on rockers; the child straddles it and pretends to ride