fortify vs substantiate

fortify and substantiate both are verbs.

Word	Noun	Adjective	Verb	Adverb
fortify	No	No	Yes	No
substantiate	No	No	Yes	No

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

fortify (verb)	substantiate (verb)
add alcohol to (beverages)	solidify, firm, or strengthen
make strong or stronger	establish or strengthen as with new evidence or facts
add nutrients to	make real or concrete; give reality or substance to
prepare oneself for a military confrontation	represent in bodily form
enclose by or as if by a fortification