friar's lantern vs will-o'-the-wisp

friar's lantern and will-o'-the-wisp both are nouns.

Word	Noun	Adjective	Verb	Adverb
friar's lantern	Yes	No	No	No
will-o'-the-wisp	Yes	No	No	No

As nouns, friar's lantern and will-o'-the-wisp are synonyms defined as:

friar's lantern and will-o'-the-wisp: a pale light sometimes seen at night over marshy ground

Other synonyms of friar's lantern include ignis fatuus, jack-o'-lantern.

friar's lantern (noun)	will-o'-the-wisp (noun)
a pale light sometimes seen at night over marshy ground	an illusion that misleads
	a pale light sometimes seen at night over marshy ground