diminutive vs flyspeck

diminutive and flyspeck both are nouns.

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

As adjectives, diminutive and flyspeck are synonyms defined as:

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

diminutive (noun)	flyspeck (noun)
a word that is formed with a suffix (such as -let or -kin) to indicate smallness	a tiny dark speck made by the excrement of a fly

diminutive (adjective)	flyspeck (adjective)
very small	very small