convenience vs lav

convenience and lav both are nouns.

Word	Noun	Adjective	Verb	Adverb
convenience	Yes	No	No	No
lav	Yes	No	No	No

As nouns, lav is a hypernym of convenience; that is, lav is a word with a broader meaning than convenience:

Other hypernyms of convenience include facility, bathroom, can, john, lavatory, privy, toilet.

convenience (noun)	lav (noun)
a device or control that is very useful for a particular job	a room or building equipped with one or more toilets
a toilet that is available to the public
the quality of being useful and convenient
the state of being suitable or opportune