To strengthen and secure (a position) with fortifications.
To prop up; bolster
(Elec.) To supply voltage or current to (a circuit, component, etc.)
To buoy up or hearten:
(Intransitive) To prepare for something bad, as an impact or blow.
To verify; to make good; to substantiate; to establish; to sustain.
To make or become tough or tougher
To cause to move backward or in a reverse direction:
To provide with pillars or added strength as if from pillars.
To place or lean (something) against a support
To take away (a part from a whole)
The definition of tighten is to make something more fixed in place, more constricted, or more snug.
Find another word for reinforce. In this page you can discover 31 synonyms, antonyms, idiomatic expressions, and related words for reinforce, like: strengthen, fortify, buttress, energize, bolster, brace, accentuate, reward, support, toughen and back.