1. Having value that is not acknowledged
   - unappreciated, unsung

See also: unacknowledged

• Old English sheepdog
• Old Faithful
• old fart
• old fashioned
• Old French
• Old Frisian
• old geezer
• Old Glory
• old gold
• old growth
• old guard
• old hand
• Old Hickory
• Old High German
• Old Icelandic
• Old Irish
• Old Ironsides
• Old Italian
• old lady
• Old Latin
• Old Line State
• old maid
• old maid flower
• old man
• old man of the mountain