snail mail vs e-mail

snail mail and e-mail both are nouns.

Word	Noun	Adjective	Verb	Adverb
snail mail	Yes	No	No	No
e-mail	Yes	No	Yes	No

snail mail (noun)	e-mail (noun)
any mail that is physically delivered by the postal service	(computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that can be regenerated at the recipient's terminal when the recipient logs in

snail mail (verb)	e-mail (verb)
	communicate electronically on the computer