Synonyms for Custom:

adj.

all (adjective)
custom-made.
custom-built (adjective)
made-to-order.
habitual (adjective)
conventional, conditioned, common, timeworn, well-worn, regular, Acclimated, habitual, routine, Familiar, accustomed.

n.

inheritance, as is someone's wont, common practice, culture, take to, daily life. manners, praxis, institution, trick or treat, local color, usual, legacy. traffic, business, patronage, trade. agree, custom-built. act (noun)
usage, usance.
cognition (noun)
tradition.
conformity (noun)
conformity, conformance, compliance, propriety, convention, consistency, adherence, formality, submissiveness, manner, congruity, ritual, observance, correctness, etiquette, acquiescence, obedience, accordance, submission.
custom (noun)
customized, bespoke, customs, bespoken, made-to-order, tailor-made, customised, custom-made, customs duty, usage, usance, impost, tailored, tradition.
fashion (noun)
style, vogue.
habit (noun)
leaning, wont, rut, Familiarity, second nature, temperament, tradition, fixed ways, habit, acclimation, tendency, instinct, mannerism, addiction, disposition, conventionality, trait, daily grind, regularity, way of life, treadmill.
habitual action (noun)
manner, habit, form, way, practice, observance, consuetude, procedure, daily grind, routine, mode, wont, usage, praxis, precedent, characteristic, second nature, addiction, matter of course.
regularity (noun)
normality, rhythm, constancy, periodicity, standard, predominance, frequency, universality, monotony, recurrence, orthodoxy, steadiness.
ritual, traditional action (noun)
attitude, rite, method, unwritten law, taste, design, style, formality, ceremony, vogue, pattern, mores, character, convention, type, mold, etiquette.

Other synonyms:

custom-built, mores, branded, daily life, praxis, consuetude, local color, trick or treat, cash-and-carry, practice. traffic, institution, legacy, patronage. trade, business, commercial. ceremony
rite.
convention
form.
manner
way.
tradition
unwritten law.
usage
usage.
Other relevant words:
custom-made, mode, traffic, mold, customs, usance, institution, trade, cash-and-carry, character, method, impost, customs duty, custom-built, bespoken, tailored, style, vogue, bespoke, common practice, consuetude, legacy, praxis, customized, form, made-to-order, precedent, branded, procedure, type, patronage, usage, pattern, tailor-made, commercially, taste, customised, characteristic, attitude, ceremony, brand name, mores, practice, business, way, matter of course, manners, culture, consumable, unwritten law, rite, design.

Usage examples for custom

  1. " That is an evil custom answered Balin; " but if I must, I must." – Stories from Le Morte D'Arthur and the Mabinogion by Beatrice Clay
  2. Custom has made it necessary." – Furze the Cruel by John Trevena
  3. The usual custom with us was to eat only two meals a day and these were served at each end of the day. – Indian Boyhood by [AKA Ohiyesa], Charles A. Eastman