THESAURUS
adhere to
abide by, act up to, administer, attend to, be faithful to, bite, carry out, carry through, clasp, cleave to, clench, clinch, cling, clip, clutch, complete, comply with, conform to, discharge, do justice to, effect, effectuate, embrace, enforce, execute, fill, fill out, follow, freeze to, fulfill, grapple, grasp, grip, gripe, hang on, hang on to, heed, hold, hold by, hold fast, hold on, hold on to, hold tight, honor, hug, implement, keep, keep faith with, keep hold of, live up to, make, make good, make out, meet, never let go, nip, observe, promulgate, prosecute, put in force, put through, regard, render, respect, satisfy, stick to, transact
ROGET THESAURUS
adhere to
Perseverance
VB
persevere, persist, hold on, hold out, die in the last ditch, be in at the death, stick to, cling to,
adhere to, stick to one's text, keep on, keep to one's course, keep to one's ground, maintain one's course, maintain one's ground, go all lengths, go through fire and water, bear up, keep up, hold up, plod, stick to work, continue, follow up, die in harness, die at one's post.
Habit
VB
be wont, fall into a rut, fall into a custom, tread the beaten track, follow the beaten track, tread the beaten path, follow the beaten, stare super antiquas vias, move in a rut, run on in a groove, go round like a horse in a mill, go on in the old jog trot way, habituate, inure, harden, season, caseharden, accustom, familiarize, naturalize, acclimatize, keep one's hand in, train, get into the way, get into the knack of, learn, cling to,
adhere to, repeat, acquire a habit, contract a habit, fall into a habit, acquire a trick, contract a trick, fall into a trick, addict oneself to, take to, get into, be habitual, prevail, come into use, become a habit, take root, gain upon one, grow upon one.
Observance
VB
observe, comply with, respect, acknowledge, abide by, cling to,
adhere to, be faithful to, act up to, meet, fulfill, carry out, carry into execution, execute, perform, keep, satisfy, discharge, do one's office, perform an obligation, fulfill an obligation, discharge an obligation, acquit oneself of an obligation, make good, make good one's word, make good one's promise, keep one's word, keep one's promise, redeem one's pledge, keep faith with, stand to one's engagement.