The word grief is a noun. It is a pain from suffering or hardship.
The verb avert does not have a corresponding noun, it does, however, have a corresponding adjective: avertable.
There is no plural form of "grief" If it was a verb it might be "grieves" but not for nouns
There is no verb corresponding to the adjective voracious.
The verb "to govern" is the verb form of the noun government.
No solution is a noun. Solve is the corresponding verb.
This question confuses me. Grief is either an abstract noun: e.g. His grief was incredible. OR, in a very specific context, a verb. It does not have an adverb.
describe
to tighten,
Corresponding verb to the noun central is centralise (or centralize)
The corresponding noun to the verb flee is flight.
Advertisement is the corresponding noun to the verb advertise