observance

noun

1 strict observance of the rules:

compliance with, adherence to, conformity to, obedience to, acquiescence in, accordance with, respect for;

keeping, obeying, observation, fulfilment of, following, performance, honouring, heeding;

archaic abidance by.

▷antonyms disregard.

2 religious observances:

rite, ritual, ceremony, ceremonial, celebration, practice, service, office, festival, tradition, custom, convention, usage, habit, formality, form;

formal praxis.

3 her baby's motionless observance of me:

scrutiny, observation, examination, inspection, watching, viewing, eyeing, looking.

observance Oxford Dictionary of English