compose vs harmonise

compose and harmonise both are verbs.

Word	Noun	Adjective	Verb	Adverb
compose	No	No	Yes	No
harmonise	No	No	Yes	No

As verbs, harmonise is a hyponym of compose; that is, harmonise is a word with a more specific, narrower meaning than compose:

compose (verb)	harmonise (verb)
make up plans or basic details for	bring into consonance, harmony, or accord while making music or singing
produce a literary work	bring into consonance or accord
write music	bring (several things) into consonance or relate harmoniously
put together out of existing material	sing or play in harmony
calm (someone, especially oneself); make quiet	write a harmony for
form the substance of	go together