Noun

• S: (n) hobbyhorse (a topic to which one constantly reverts) "don't get him started on his hobbyhorse"
• direct hypernym / inherited hypernym / sister term
• S: (n) preoccupation (an idea that preoccupies the mind and holds the attention)
• direct hyponym / full hyponym
• S: (n) obsession, fixation (an unhealthy and compulsive preoccupation with something or someone)
• S: (n) hang-up (an emotional preoccupation)
• S: (n) hobbyhorse (a topic to which one constantly reverts) "don't get him started on his hobbyhorse"
• S: (n) self-absorption (preoccupation with yourself to the exclusion of everything else)
• S: (n) omphaloskepsis, navel-gazing (literally, the contemplation of one's navel, which is an idiom usually meaning complacent self-absorption)
• direct hypernym / inherited hypernym / sister term
• derivationally related form
• S: (n) hobby, hobbyhorse, rocking horse (a child's plaything consisting of an imitation horse mounted on rockers; the child straddles it and pretends to ride)
• part meronym
• direct hypernym / inherited hypernym / sister term
• S: (n) plaything, toy (an artifact designed to be played with)
• S: (n) artifact, artefact (a man-made object taken as a whole)
• S: (n) whole, unit (an assemblage of parts that is regarded as a single entity) "how big is that part compared to the whole?"; "the team is a unit"
• S: (n) object, physical object (a tangible and visible entity; an entity that can cast a shadow) "it was full of rackets, balls and other objects"
• S: (n) physical entity (an entity that has physical existence)
• S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))