Spell Contraction

If you cast a spell with a cast time of an action or a bonus action, on the same turn you can cast another spell of 1st-level or higher with the actions you have remaining. The second spell slot used must be of a level equal to or less than half your proficiency bonus rounded down (minimum of 1). For example, a 6th level bard could cast hypnotic pattern as an action and then cast healing word at 2nd-level as a bonus action.

Additionally, you can accelerate the cast time of a spell that requires an action to cast, causing it to only take a bonus action. You can accelerate the cast time of a spell in this way once per short or long rest.