spread(A small overlap that extends the shape of the upper of two differently colored, abutting objects. A spread extends beyond the area that it knocks out)
accrual(права тощо); escalation; expansion(в т. ч. союзу тощо; у т.ч. союзу тощо); extension(в т. ч. права тощо; напр. прав, домагань; у т.ч. права тощо)
complication(a complex or intricate feature or element • Create your own watch face with complications tailored to whatever you’re into. Створіть власний циферблат із корисними для вас розширеннями.merriam-webster.com, apple.com, apple.comandriy f)
HTML extension(A feature or setting that is an extension to the formal HTML specification. Extensions may not be supported by all Web browsers, but they may be used widely by Web authors. An example of an extension is marquee scrolling text)
merriam-webster.com, apple.com, apple.com andriy f)