dementia praecox/ʹpreekoks/ noun

• ascertain
• ascesis
• ascetic
• asci
• ascidian
• ASCII
• ascites
• as clear as mud
• ascomycete
• as cool as a cucumber
• ascorbate
• ascorbic acid
• ascribe
• ascription
• ascus
• (as) dead as a doornail
• asdic
• as distinct from
• -ase
• ASEAN
• a second string to one's bow
• asepsis
• aseptic
• asexual
• asexual reproduction