foam at the mouth vs froth at the mouth

foam at the mouth and froth at the mouth both are verbs.

Word	Noun	Adjective	Verb	Adverb
foam at the mouth	No	No	Yes	No
froth at the mouth	No	No	Yes	No

As verbs, foam at the mouth and froth at the mouth are synonyms defined as:

foam at the mouth and froth at the mouth: be in a state of uncontrolled anger

foam at the mouth (verb)	froth at the mouth (verb)
be in a state of uncontrolled anger	be in a state of uncontrolled anger