custom vs practice

custom and practice both are nouns.

Word	Noun	Adjective	Verb	Adverb
custom	Yes	Yes	No	No
practice	Yes	No	Yes	No

As nouns, practice is a hypernym of custom; that is, practice is a word with a broader meaning than custom:

Other hypernyms of custom include pattern, survival.

As nouns, practice is a hypernym of custom; that is, practice is a word with a broader meaning than custom:

custom (noun)	practice (noun)
accepted or habitual practice	a customary way of operation or behavior
habitual patronage	systematic training by multiple repetitions
a specific practice of long standing	the exercise of a profession
money collected under a tariff	translating an idea into action
	knowledge of how something is usually done

custom (adjective)	practice (adjective)
made according to the specifications of an individual

custom (verb)	practice (verb)
	learn by repetition
	engage in a rehearsal (of)
	carry out or practice; as of jobs and professions
	avail oneself to
	engage in or perform