froth at the mouth vs foam at the mouth

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

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

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

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

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