speak vs mash

speak is not a noun while mash is a noun.

Word	Noun	Adjective	Verb	Adverb
speak	No	No	Yes	No
mash	Yes	No	Yes	No

As verbs, mash is a hyponym of speak; that is, mash is a word with a more specific, narrower meaning than speak:

speak (noun)	mash (noun)
	mixture of ground animal feeds
	a mixture of mashed malt grains and hot water; used in brewing

speak (verb)	mash (verb)
express in speech	reduce to small pieces or particles by pounding or abrading
exchange thoughts; talk with	talk or behave amorously, without serious intentions
use language	to compress with violence, out of natural shape or condition
give a speech to
make a characteristic or natural sound