promise vs plight

promise and plight both are nouns.

Word	Noun	Adjective	Verb	Adverb
promise	Yes	No	Yes	No
plight	Yes	No	Yes	No

As verbs, plight is a hyponym of promise; that is, plight is a word with a more specific, narrower meaning than promise:

Other hyponyms of promise include pledge, swear off, contract, undertake, guarantee, undertake.

promise (noun)	plight (noun)
grounds for feeling hopeful about the future	a solemn pledge of fidelity
a verbal commitment by one person to another agreeing to do (or not to do) something in the future	a situation from which extrication is difficult especially an unpleasant or trying one

promise (verb)	plight (verb)
make a promise or commitment	promise solemnly and formally
promise to undertake or give	give to in marriage
make a prediction about; tell in advance
give grounds for expectations