agreeing or accordant; compatible; not self-contradictory

His views and actions are consistent.

constantly adhering to the same principles, course, form, etc.

a consistent opponent.

holding firmly together; cohering.

Archaic . fixed; firm.

adjective

disagreeing , erratic , incongruous , inconsistent , inconstant , irregular , varying , incompatible , unfitting , unsuitable

adjective

dependable , even , expected , homogeneous , invariable , logical , of a piece , persistent , rational , same , steady , true , true to type , unchanging , undeviating , unfailing , uniform , unvarying , accordant , according to , agreeable , all of a piece , coherent , conforming with , congenial , congruous , consonant , equable , harmonious , like , matching , sympathetic , compatible , conformable , correspondent , corresponding , changeless , constant , chronic , commensurate , concordant , consentaneous , coordinated , firm , inveterate , isogenous , regular , steadfast , suitable , unfaltering , unregenerate , unswerving , unwavering