THESAURUS
fill in
accomplish, acquaint, act for, admit, advise, alternate, apprise, assimilate, bring to completion, bring to fruition, change places with, clue, complete, comprehend, comprise, contain, count in, cover, crowd out, cut out, displace, do a hitch, do a stint, do a tour, do time, double for, eke out, embody, embrace, encircle, enclose, encompass, enlist, envisage, fill,
fill in for, fill out, fill up, fulfill, ghost, ghostwrite, have a go, have tenure, hold, hold office, include, incorporate, insert, insinuate, intercalate, interject, interpolate, interpose, keep a watch, locum tenens, make good, make up, mature, notify, number among, occupy, piece out, pinch, pinch-hit, post, re-up, receive, reckon among, reckon in, reckon with, reenlist, refill, relieve, replace, replenish, represent, round out, serve time, shallow, shoal, sign up, silt up, spell, spell off, stand in for, subrogate, substitute for, succeed, supersede, supplant, surrogate, swap places with, take in, take into account, take into consideration, take turns, take up, tell, throw in, time off, top off, understudy for, warn
ROGET THESAURUS
fill in
Completeness
VB
be complete, come to a head, render complete, complete, fill, charge, load, replenish, make up, make good, piece out, eke out, supply deficiencies, fill up,
fill in, fill to the brim, fill the measure of, saturate, go the whole hog, go the whole length, go all lengths.