baseball mitt vs baseball glove

baseball mitt and baseball glove both are nouns.

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

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

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

Other synonyms of baseball mitt include glove, mitt.

baseball mitt (noun)	baseball glove (noun)
the handwear used by fielders in playing baseball	the handwear used by fielders in playing baseball