Synonyms of invaluable

1 Syllable
dear
2 Syllables
worthier, worthiest, helpful, recherché, braggest, costly, topflight, worthy, precious
3 Syllables
out-of-bounds, hardwearing, big-ticket, valuable, priceless, recherche, excellent, worthwhile
4 Syllables
assistive, expensive, treasurable, collectible, serviceable
5 Syllables
inestimable