Worthless antonyms

What is the opposite word for Worthless?

• valuable

  of no use
• useful

  of no use
• worthy

  of no use
• important

  of no use
• precious
• meaningful

  of no use
• worthwhile
• beneficial
• fruitful
• profitable
• helpful
• invaluable
• priceless
• productive
• significant
• expensive
• semiprecious
• cherished
• prized
• exceptional
• blue-chip
• rich
• worth
• esteemed
• treasured
• choice
• fancy
• high-grade
• special
• of import