- 専門家【せんもんか】 - specialist, expert, professional, authority, pundit 
- 専門【せんもん】 - speciality, specialty, subject of study, expert, area of expertise 
- 専用【せんよう】 - (one's) exclusive use, private use, personal use, dedicated use, use for a particular purpose, exclusive use (of particular products), using only (e.g. a certain brand), using solely 
- 専念【せんねん】 - absorption, giving undivided attention, devoting oneself (to) 
- 専攻【せんこう】 - major subject, special study 
- 専務【せんむ】 - special duty, being in sole charge of a duty, senior managing director, executive director 
- 専ら【もっぱら】 - wholly, solely, entirely, exclusively, devotedly, fixedly, principally, mostly, chiefly, mainly 
- 専制【せんせい】 - despotism, autocracy 
- 専門学校【せんもんがっこう】 - vocational school, technical school 
- 専業【せんぎょう】 - special occupation, principal occupation, specialty, monopoly 
- 専門店【せんもんてん】 - specialist shop, shop specializing in a particular type of product 
- 専修【せんしゅう】 - specialization, specialisation 
- 専門的【せんもんてき】 - technical (e.g. discussion), exclusive, professional 
- 専任【せんにん】 - full-time service 
- 専門医【せんもんい】 - (medical) specialist 
- 専属【せんぞく】 - exclusive, attached to, specialist 
- 専守防衛【せんしゅぼうえい】 - nonaggressive defense (policy) (defence) 
- 専横【せんおう】 - arbitrariness, despotism, high-handedness, tyranny 
- 専従【せんじゅう】 - working exclusively for, working full-time (for) 
- 住専【じゅうせん】 - housing-loan corporation