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:
To verify; to make good; to substantiate; to establish; to sustain.
(Intransitive) To prepare for something bad, as an impact or blow.
To make or become tough or tougher
To take away (a part from a whole)
To cause to move backward or in a reverse direction:
To provide with pillars or added strength as if from pillars.
The definition of tighten is to make something more fixed in place, more constricted, or more snug.
To place or lean (something) against a support
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, support, reward, brace, toughen, subtract and emphasise.