diminutive vs bantam

diminutive and bantam both are nouns.

Word	Noun	Adjective	Verb	Adverb
diminutive	Yes	Yes	No	No
bantam	Yes	Yes	No	No

As adjectives, diminutive and bantam are synonyms defined as:

Other synonyms of diminutive include flyspeck, lilliputian, midget, petite, tiny.

diminutive (noun)	bantam (noun)
a word that is formed with a suffix (such as -let or -kin) to indicate smallness	any of various small breeds of fowl

diminutive (adjective)	bantam (adjective)
very small	very small