practice vs rehearse

practice is a noun but rehearse is not a noun.

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

As verbs, practice and rehearse are synonyms defined as:

Other synonyms of practice include practise.

practice (noun)	rehearse (noun)
a customary way of operation or behavior
systematic training by multiple repetitions
the exercise of a profession
translating an idea into action
knowledge of how something is usually done

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