mitt vs baseball glove

mitt and baseball glove both are nouns.

Word	Noun	Adjective	Verb	Adverb
mitt	Yes	No	No	No
baseball glove	Yes	No	No	No

As nouns, mitt and baseball glove are synonyms defined as:

mitt and baseball glove: the handwear used by fielders in playing baseball

Other synonyms of mitt include baseball mitt, glove.

mitt (noun)	baseball glove (noun)
the handwear used by fielders in playing baseball	the handwear used by fielders in playing baseball
the (prehensile) extremity of the superior limb