interchange vs sub

interchange and sub both are nouns.

Word	Noun	Adjective	Verb	Adverb
interchange	Yes	No	Yes	No
sub	Yes	No	Yes	No

As verbs, sub is a hyponym of interchange; that is, sub is a word with a more specific, narrower meaning than interchange:

Other hyponyms of interchange include sell, cash, cash in, ransom, redeem, redeem, fill in, stand in, substitute, swap, switch, swop, trade, barter, trade, trade in.

interchange (noun)	sub (noun)
the act of changing one thing for another thing	a submersible warship usually armed with torpedoes
mutual interaction; the activity of reciprocating or exchanging (especially information)	a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
reciprocal transfer of equivalent sums of money (especially the currencies of different countries)
a junction of highways on different levels that permits traffic to move from one to another without crossing traffic streams

interchange (verb)	sub (verb)
reverse (a direction, attitude, or course of action)	be a substitute
cause to change places
give to, and receive from, one another
put in the place of another; switch seemingly equivalent items