documentation
reenforcement, reinforcement
supporting
accompaniment, backup, musical accompaniment
bread and butter, keep, livelihood, living, sustenance
backing, financial backing, financial support, funding
affirm, confirm, corroborate, substantiate, sustain
abide, bear, brook, digest, endure, put up, stand, stick out, stomach, suffer, tolerate
subscribe
defend, fend for
keep going, patronage, patronise, patronize
hold, hold up, sustain
back, endorse, indorse, plump for, plunk for
back up
bear out, corroborate, underpin