pear vs bartlett

pear and bartlett both are nouns.

Word	Noun	Adjective	Verb	Adverb
pear	Yes	No	No	No
bartlett	Yes	No	No	No

As nouns, bartlett is a hyponym of pear; that is, bartlett is a word with a more specific, narrower meaning than pear:

Other hyponyms of pear include bosc, anjou, bartlett pear, seckel, seckel pear, Clapp's Favourite.

pear (noun)	bartlett (noun)
sweet juicy gritty-textured fruit available in many varieties	juicy yellow pear
Old World tree having sweet gritty-textured juicy fruit; widely cultivated in many varieties