This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. One that arrives or comes: free food for all comers.

n. One showing promise of attaining success: a political comer.

n. one in a race who is catching up to others and shows promise of winning

n. one who is catching up in some contest and has a likelihood of victory

n. One who arrives

n. One who comes, or who has come; one who has arrived, and is present.

n. One who comes; one who approaches, or has lately arrived: often applied to things.

n. In stock-raising, an animal that is ‘coming on’ or promises well.

n. someone with a promising future

n. someone who arrives (or has arrived)

"Strombel informs Sondra that Peter Lyman, a handsome London aristocrat and political up-and-comer, is actually a serial murderer known as the Tarot Card Killer."

rival    challenger    competitor    contender    competition   

all comers   

come   

Hummer    Summer    brummer    bummer    drummer    dumber    glummer    hummer    midsummer    plumber   

corner    confine    quadrant    nook    perimeter    occupant