Adjective
caustic - Sarcastic or severely critical, often in a hurtful or biting manner; or able to burn or corrode organic tissue, typically referring to chemicals or substances.

The caustic chemical spilled onto the floor and quickly started to eat away at the floor surface.
romantic - Describing actions, gestures, or situations that are intended to convey deep feelings of love, often in a thoughtful or sentimental manner.

He gave her a romantic gift for their anniversary, along with a hand-written letter expressing his love and appreciation.