Old English vs Jutish

Old English and Jutish both are nouns.

Word	Noun	Adjective	Verb	Adverb
Old English	Yes	No	No	No
Jutish	Yes	No	No	No

As nouns, Jutish is a hyponym of Old English; that is, Jutish is a word with a more specific, narrower meaning than Old English:

Old English: English prior to about 1100
Jutish: a southern dialect of Old English, spoken in the Anglo-Saxon kingdom of Kent

Other hyponyms of Old English include West Saxon, Anglian, Kentish.

Old English (noun)	Jutish (noun)
English prior to about 1100	a southern dialect of Old English, spoken in the Anglo-Saxon kingdom of Kent