Words to Describe pentodes

How pentodes often is described ("________ pentodes")

• off
• suppressor
• modern
• high
• cutoff
• certain
• most
• type
• many
• diode
• several
• parallel
• small
• normal
• conventional
• important
• suitable
• ordinary
• identical
• commercial
• practical
• triode
• remote
• connected
• typical
• sharp
• amplifier