walkingstick vs walking stick

walkingstick and walking stick both are nouns.

Word	Noun	Adjective	Verb	Adverb
walkingstick	Yes	No	No	No
walking stick	Yes	No	No	No

As nouns, walkingstick and walking stick are synonyms defined as:

walkingstick and walking stick: any of various mostly tropical insects having long twiglike bodies

Other synonyms of walkingstick include stick insect.

walkingstick (noun)	walking stick (noun)
any of various mostly tropical insects having long twiglike bodies	any of various mostly tropical insects having long twiglike bodies
	a stick carried in the hand for support in walking