Jat vs doer

Jat and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jat	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of Jat; that is, doer is a word with a broader meaning than Jat:

Jat: a member of an Indo-European people widely scattered throughout the northwest of the Indian subcontinent and consisting of Muslims and Hindus and Sikhs
doer: a person who acts and gets things done

Other hypernyms of Jat include actor, worker.

Jat (noun)	doer (noun)
a member of an Indo-European people widely scattered throughout the northwest of the Indian subcontinent and consisting of Muslims and Hindus and Sikhs	a person who acts and gets things done