serious is a valid English word

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

Meanings

Adjective (COMPARABLE)

Without humor or expression of happiness; grave in manner or disposition
• Synonym: earnest, solemn
Important; weighty; not insignificant
• This is a serious problem. We'll need our best experts.
Really intending what is said (or planned, etc); in earnest; not jocular or deceiving
• After all these years, we're finally getting serious attention.

Adverb (NOT COMPARABLE)

(colloquial dialect) In a serious manner; seriously.

serious is a Scrabble valid word

serious

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

serious is an iScramble, QuickWords valid word

serious

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

Same letters words (Anagrams)

• ROUSIES

Same letters plus one

• DESIROUS
• EUROSIDS
• FOURSIES
• GRISEOUS
• ISOUREAS
• NEUROSIS
• QUIROSES
• RESINOUS
• SCOURIES
• SENIOURS
• SERVIOUS
• SIDEROUS
• SISSEROU
• SOILURES
• SOULIERS
• TROUSIES
• URIOSTES

Same letters minus one

• ISSUER
• OSIERS
• OUSIES
• ROSIES
• ROUSES
• ROUSIE
• ROUSSE
• SEISOR
• SEROUS
• SOURIS
• SUEROS
• SUIRES
• SURSIE
• URESIS
• UROSIS