foil vs tinfoil

foil and tinfoil both are nouns.

Word	Noun	Adjective	Verb	Adverb
foil	Yes	No	Yes	No
tinfoil	Yes	No	No	No

As nouns, tinfoil is a hyponym of foil; that is, tinfoil is a word with a more specific, narrower meaning than foil:

Other hyponyms of foil include aluminium foil, aluminum foil, tin foil, chaff, gold foil, tin foil.

foil (noun)	tinfoil (noun)
a light slender flexible sword tipped by a button	foil made of tin or an alloy of tin and lead
a piece of thin and flexible sheet metal
picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector
a device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through
anything that serves by contrast to call attention to another thing's good qualities

foil (verb)	tinfoil (verb)
cover or back with foil
hinder or prevent (the efforts, plans, or desires) of
enhance by contrast