certainly is a valid English word

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

Meanings

Adverb (COMPARABLE)

In a way which is certain; with certainty.
Without doubt, surely.
• The accident was certainly caused by human error.
An emphatic affirmative answer; of course.
• Would you like it with ice?  Certainly, and with lemon please.

certainly is a Scrabble valid word

certainly

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

certainly is an iScramble, QuickWords valid word

certainly

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

Same letters words (Anagrams)

• none

Same letters plus one

• ANTICLERGY
• CENTRALITY
• INTRACYCLE
• LECTIONARY
• NUCLEARITY
• TRIVALENCY

Same letters minus one

• ANCYLITE
• CARNITYL
• CENTIRAY
• CLARINET
• CLYTRINE
• INTERCAL
• INTERLAY
• ITERANCY
• LITERACY
• LITRACEN
• LYTERIAN
• TRAYLINE