shellback is a valid English word

Scrabble validity: valid ( international - Sowpods, US - Twl06 )
iScramble validity: valid
QuickWords validity: valid

Meanings

Noun (COUNTABLE)

A worldly sailor.
• Synonyms: barnacle
A sailor who has crossed the equator.

shellback is a Scrabble valid word

s1h4e1l1l1b3a1c3k5

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is valid in Scrabble ✔
• 20 points

shellback is an iScramble, QuickWords valid word

s1h2e3l4l5b6a7c8k9

• The word is valid in iScramble ✔
• The word is valid in QuickWords ✔
• 45 points

Same letters words (Anagrams)

• BACKSHELL

Same letters plus one

• BACKSHELLS
• BLACKHOLES
• CHALKBELTS
• SHELLBACKS

Same letters minus one

• BACKSELL
• BECHALKS
• BLASCHKE
• HALLECKS
• SELLBACK
• SHELLACK