hobber vs machining center

hobber and machining center both are nouns.

Word	Noun	Adjective	Verb	Adverb
hobber	Yes	No	No	No
machining center	Yes	No	No	No

As nouns, machining center is a hypernym of hobber; that is, machining center is a word with a broader meaning than hobber:

hobber: a special type of milling machine used for gear cutting, cutting splines, and cutting sprockets.
machining center: a milling machine with automatic tool changers, tool magazines or carousels, CNC control, coolant systems, and enclosures.

Other hypernyms of hobber include miller, milling machine.

hobber (noun)	machining center (noun)
a special type of milling machine used for gear cutting, cutting splines, and cutting sprockets.	a milling machine with automatic tool changers, tool magazines or carousels, CNC control, coolant systems, and enclosures.