snorkel vs pigboat

snorkel and pigboat both are nouns.

Word	Noun	Adjective	Verb	Adverb
snorkel	Yes	No	Yes	No
pigboat	Yes	No	No	No

snorkel (noun)	pigboat (noun)
air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time	a submersible warship usually armed with torpedoes
breathing device consisting of a bent tube fitting into a swimmer's mouth and extending above the surface; allows swimmer to breathe while face down in the water

snorkel (verb)	pigboat (verb)
dive with a snorkel