forfend vs forestall

forfend and forestall both are verbs.

Word	Noun	Adjective	Verb	Adverb
forfend	No	No	Yes	No
forestall	No	No	Yes	No

As verbs, forestall is a hypernym of forfend; that is, forestall is a word with a broader meaning than forfend:

forfend: prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off
forestall: keep from happening or arising; make impossible

Other hypernyms of forfend include forbid, foreclose, preclude, prevent.

forfend (verb)	forestall (verb)
prevent the occurrence of; prevent from happening; to protect from or to keep away anything undesirable; to ward off	act in advance of; deal with ahead of time
	keep from happening or arising; make impossible