Substitute pretty much means replacement. If you haven't got what you really want then you get then next best thing instead.
seasonal best
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Parsley is the best substitute for cilantro in recipes due to its similar fresh and slightly peppery flavor.
The best substitute for sherry vinegar in a recipe is red wine vinegar or apple cider vinegar.
White wine vinegar would be the best substitute, if you have it on hand.
Xenon may be a substitute.
A Royal Rule
Finger,spin brush
canola oil is the best substitute for palm oil. it can be used for toiletries too.
i think a baseball bat...
If color is not important, red balsamic vinegar would be the best substitute for white. Otherwise, a sweet white wine would be a possible replacement.
The name Jacqui means 'substitute'