I think we're circling back, KDFs are definitely not suited for hashing passwords. For example, you wouldn't use SHA-3(password) as a password hashing function, but it makes a fine KDF.
If you're thinking of PBKDF2, it's a "password-based" KDF as its name hints. While both password-based KDFs and password hashing functions seem to have common properties, I think the term "password hash" has caught up more (specifically thanks to the password hashing competition).
If you're thinking of PBKDF2, it's a "password-based" KDF as its name hints. While both password-based KDFs and password hashing functions seem to have common properties, I think the term "password hash" has caught up more (specifically thanks to the password hashing competition).