baseball glove vs mitt

baseball glove and mitt both are nouns.

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

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

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

Other synonyms of baseball glove include baseball mitt, glove.

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