Used before different, before comparatives with more and less, and idiomatically before other comparatives.
not
Used idiomatically before certain other adjectives.
a negating expression; an answer that shows disagreement, denial, refusal, or disapproval
a vote not in favor, or opposing a proposition
Not any.
Hardly any.
Not (a); not properly, not really; not fully.
Not any possibility or allowance of (doing something).
not, does not, do not, etc.
without
like
Used to show disagreement, negation, denial, refusal, or prohibition.
Used together with an affirmative word or phrase to show agreement.
Used to show agreement with a negative question.
vehement rejection of truthfulness
disgust
mild disapproval
Differently, in another way.
In different circumstances; or else.
In all other respects.
Other than supposed; different.