out to vs bent

out to is not a noun while bent is a noun.

Word	Noun	Adjective	Verb	Adverb
out to	No	Yes	No	No
bent	Yes	Yes	No	No

As adjectives, out to and bent are synonyms defined as:

Other synonyms of out to include bent on, dead set.

out to (noun)	bent (noun)
	a special way of doing something
	a relatively permanent inclination to react in a particular way
	an area of grassland unbounded by fences or hedges
	grass for pastures and lawns especially bowling and putting greens

out to (adjective)	bent (adjective)
fixed in your purpose	of metal e.g.
	fixed in your purpose
	used of the back and knees; stooped