THESAURUS
digress
bear off, bend, branch off, bypass, change the bearing, curve, depart, depart from, detour, deviate, divagate, divaricate, diverge, drift, excurse, get sidetracked, go around, go astray, go round about, heel, make a detour, maunder, ramble, roam, sheer, shift, stray, swerve, tack, trend, turn, turn aside, vary, veer, wander
ROGET THESAURUS
digress
Diffuseness
VB
be diffuse, run out on, descant, expatiate, enlarge, dilate, amplify, expand, inflate, launch out, branch out, rant, maunder, prose, harp upon, dwell on, insist upon,
digress, ramble, battre la campagne, beat about the bush, perorate, spin a long yarn, protract, spin out, swell out, draw out, battologize.
Deviation
VB
alter one's course, deviate, depart from, turn, trend, bend, curve, swerve, heel, bear off, gybe, wear, intervert, deflect, divert, divert from its course, put on a new scent, shift, shunt, draw aside, crook, warp, stray, straggle, sidle, diverge, tralineate,
digress, wander, wind, twist, meander, veer, tack, divagate, sidetrack, turn aside, turn a corner, turn away from, wheel, steer clear of, ramble, rove, drift, go astray, go adrift, yaw, dodge, step aside, ease off, make way for, shy, fly off at a tangent, glance off, wheel about, face about, turn to the right about, face to the right about, waddle, go out of one's way, lose one's way.