Paranoid

google

ref

early 19th century: modern Latin, from Greek, from paranoos ‘distracted’, from para ‘irregular’ + noos ‘mind’.

wiktionary

ref

From paranoia +‎ -oid.

etymonline

ref

paranoid (adj.)

"resembling or characterized by paranoia," 1901, irregularly formed from paranoia + -oid. As a noun, "a paranoid person," attested by 1922.