Synonyms of if in English:

if


See definition of if

conjunction

1‘if the weather is fine, we can walk to the village’

SYNONYMS
on condition that, provided, provided that, providing, providing that, presuming, presuming that, supposing, supposing that, assuming, assuming that, on the assumption that, allowing, allowing that, as long as, given that, with the provision that, with the proviso that, on the understanding that, with the understanding that, if and only if, contingent on, in the event that, allowing that
ANTONYMS

unless

2‘if I go out she gets nasty’

SYNONYMS
whenever, every time

3‘I wonder if he noticed’

SYNONYMS
whether, whether or not

4‘a useful, if unintended innovation’

SYNONYMS
although, albeit, but, even though, even if, despite being, in spite of being, yet, whilst

noun

1‘there is of course one if in all this’

SYNONYMS
uncertainty, doubt, lack of certainty, hesitation, vagueness
condition, stipulation, provision, proviso, constraint, prerequisite, precondition, requirement, specification, restriction, supposition, modification