Fluctuation
Part of speech: noun
Definition: A motion like that of waves; a moving in this and that direction. A wavering; unsteadiness. The motion or undulation of a fluid collected in a natural or artificial cavity, which is felt when it is subjected to pressure or percussion.
Example sentence: Rupee fluctuation is not so significant compared with the other currencies. Fluctuations in currencies has been fairly steady. As the finance minister often says, fluctuation is the new normal.
Variation
Part of speech: noun
Definition: The act or state of varying; a partial change in the form, position, state, or qualities of a thing; modification; alternation; mutation; diversity; deviation; as, a variation of color in different lights; a variation in size; variation of language.A distinct object or thing.The angular difference at the vessel between the direction of true north and magnetic north. Also called magnetic declination.a line of play that differs from the original
Example sentence: I sometimes ponder on variation form and it seems to me it ought to be more restrained, purer.