KEY: Fortify.
SYN: Strengthen, confirm, corroborate, garrison, brace, intrench.
ANT: Weaken, invalidate, dismantle.
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KEY: Fortitude.
SYN: Courage, endurance, braveness, calmness, resignation, hardihood, composure, resolution, stoicism, firmness.
ANT: Timidity, flinching, impatience, irritation, faintness, delicacy, effeminacy, womanishness, childishness.
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KEY: Fortuitous.
SYN: Accidental, undesigned.