11-letter words containing ack
- backside-to — backend-to.
- backslapped — Simple past tense and past participle of backslap.
- backslapper — a person who backslaps; a hearty jovial person
- backslashed — Simple past tense and past participle of backslash.
- backslashes — Plural form of backslash.
- backslidden — Past participle of backslide.
- backsliding — If you accuse someone of backsliding, you disapprove of them because they have failed to do something they promised or agreed to do, or have started again doing something undesirable that they had previously stopped doing.
- backsolving — Present participle of backsolve.
- backspacing — Present participle of backspace.
- backstabbed — Simple past tense and past participle of backstab.
- backstabber — someone who attacks another deceitfully, behind his or her back
- backstopped — Simple past tense and past participle of backstop.
- backstopper — a wall, wire screen, or the like, serving to prevent a ball from going too far beyond the normal playing area.
- backstreets — Plural form of backstreet.
- backstretch — the part of a racetrack farthest from the grandstand and opposite and parallel to the homestretch
- backstroker — a person who swims the backstroke, especially a member of a competitive swimming team who specializes in the backstroke.
- backstrokes — Plural form of backstroke.
- backswimmer — an aquatic bug belonging to the family Notonectidae that swims on its back using its back legs as oars
- backtalking — Present participle of backtalk.
- backtracked — Simple past tense and past participle of backtrack.
- backtracker — One who, or that which, backtracks.
- backwashing — A form of water treatment in which water is pumped backwards through the filter media, sometimes with intermittent use of compressed air.
- banded pack — two products which are held together with a band and sold together at a discounted price
- barebacking — sexual intercourse performed without the use of a condom
- barley sack — a burlap bag.
- biofeedback — a technique for teaching the control of autonomic functions, such as the rate of heartbeat or breathing, by recording the activity and presenting it (usually visually) so that the person can know the state of the autonomic function he or she is learning to control
- bivouacking — a military encampment made with tents or improvised shelters, usually without shelter or protection from enemy fire.
- black alder — a deciduous shrub (Ilex verticillata) of the holly family, native to E North America, with glossy leaves that turn black in the fall and bright-red berries
- black angus — Aberdeen Angus
- black birch — sweet birch.
- black bread — a kind of very dark coarse rye bread
- black bream — a dark-coloured food and game fish, Acanthopagrus australis, of E Australian seas
- black chaff — a disease of wheat, characterized by dark, elongated stripes on the chaff, caused by a bacterium, Xanthomonas translucens undulosum.
- black cumin — a Eurasian herb, Nigella sativa, having pungent aromatic seeds used as a spice, but unrelated to cumin.
- black death — a deadly disease, probably bubonic plague, which devastated Europe and Asia in the 14th cent.
- black dwarf — a cold, dark dwarf star
- black friar — a Dominican friar
- black frost — a frost without snow or rime that is severe enough to blacken vegetation
- black goods — electronic goods which are housed in black or dark casings, such as televisions, CD players, etc
- black hills — a group of mountains in W South Dakota and NE Wyoming: famous for the gigantic sculptures of US presidents on the side of Mount Rushmore. Highest peak: Harney Peak, 2207 m (7242 ft)
- black house — a type of thatched house, usually made of turf, formerly found in the highlands and islands of Scotland
- black humor — a form of humor that regards human suffering as absurd rather than pitiable, or that considers human existence as ironic and pointless but somehow comic.
- black ivory — Black slaves collectively
- black japan — a black bituminous varnish
- black light — the invisible electromagnetic radiation in the ultraviolet and infrared regions of the spectrum
- black magic — magic used for evil purposes by invoking the power of the devil
- black maple — a tree, Acer saccharum nigrum, of eastern and central North America, having furrowed, blackish bark and yellow-green flowers.
- black maria — a police van for transporting prisoners
- black medic — a widespread weedy annual plant (Medicago lupulina) of the pea family, with small yellow flowers and black seed pods, sometimes grown for forage
- black metal — a type of heavy-metal music characterized by extremely nihilistic and satanic lyrics, a repetitive drum beat rapidly alternating betweeen the snare and bass drum (a blast beat), and the ghoulish make-up worn by performers (corpse paint)