bind vs unbind

bind is a noun but unbind is not a noun.

Word	Noun	Adjective	Verb	Adverb
bind	Yes	No	Yes	No
unbind	No	No	Yes	No

bind (noun)	unbind (noun)
something that hinders as if with bonds

bind (verb)	unbind (verb)
cause to be constipated	untie or unfasten
form a chemical bond with
bind by an obligation; cause to be indebted
make fast; tie or secure, with or as if with a rope
fasten or secure with a rope, string, or cord
provide with a binding
stick to firmly
secure with or as if with ropes
wrap around with something so as to cover or enclose
create social or emotional ties