tending vs disposed

tending is a noun but disposed is not a noun.

Word	Noun	Adjective	Verb	Adverb
tending	Yes	Yes	No	No
disposed	No	Yes	No	No

As adjectives, tending and disposed are synonyms defined as:

tending and disposed: (usually followed by `to') naturally disposed toward

Other synonyms of tending include apt, given, minded.

tending (noun)	disposed (noun)
the work of providing treatment for or attending to someone or something

tending (adjective)	disposed (adjective)
(usually followed by `to') naturally disposed toward	(usually followed by `to') naturally disposed toward
	having made preparations