bind vs hold fast

bind is a noun but hold fast is not a noun.

Word	Noun	Adjective	Verb	Adverb
bind	Yes	No	Yes	No
hold fast	No	No	Yes	No

As verbs, hold fast is a hypernym of bind; that is, hold fast is a word with a broader meaning than bind:

Other hypernyms of bind include adhere, bind, bond, stick, stick to.

As verbs, bind and hold fast are synonyms defined as:

Other synonyms of bind include adhere, bond, stick, stick to.

bind (noun)	hold fast (noun)
something that hinders as if with bonds

bind (verb)	hold fast (verb)
cause to be constipated	stick to firmly
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