till vs strongbox

till and strongbox both are nouns.

Word	Noun	Adjective	Verb	Adverb
till	Yes	No	Yes	No
strongbox	Yes	No	No	No

As nouns, strongbox is a hypernym of till; that is, strongbox is a word with a broader meaning than till:

till: a strongbox for holding cash
strongbox: a strongly made box for holding money or valuables; can be locked

Other hypernyms of till include deedbox.

till (noun)	strongbox (noun)
a strongbox for holding cash	a strongly made box for holding money or valuables; can be locked
a treasury for government funds
unstratified soil deposited by a glacier; consists of sand and clay and gravel and boulders mixed together

till (verb)	strongbox (verb)
work land as by ploughing, harrowing, and manuring, in order to make it ready for cultivation