| keyless | (adjective) lacking or not requiring a key | - |
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| landless | (adjective) owning no land | - |
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| lawless | (adjective) without law or control | Synonyms: anarchic, anarchical |
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| (adjective) disobedient to or defiant of law | Synonyms: outlaw |
| (adjective) lax in enforcing laws | Synonyms: wide-open |
| leadless | (adjective) not treated with lead | Synonyms: unleaded |
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| leafless | (adjective) having no leaves | - |
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| legless | (adjective) not having legs | - |
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| less | (adjective) (comparative of `little' usually used with mass nouns) a quantifier meaning not as great in amount or degree | - |
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| (adjective) (nonstandard in some uses but often idiomatic with measure phrases) fewer | - |
| (adjective) (usually preceded by `no') lower in quality | - |
| lessened | (adjective) impaired by diminution | Synonyms: diminished, vitiated, weakened |
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| (adjective) decreased in severity; made less harsh | - |
| lesser | (adjective) of less size or importance | - |
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| (adjective) smaller in size or amount or value | - |
| lidless | (adjective) not having or covered with a lid or lids | - |
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| (adjective) always watchful | Synonyms: sleepless |
| (adjective) having no lid | - |
| lifeless | (adjective) not having the capacity to support life | - |
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| (adjective) destitute or having been emptied of life or living beings | - |
| (adjective) lacking animation or excitement or activity | - |
| (adjective) deprived of life; no longer living | Synonyms: exanimate |
| lightless | (adjective) without illumination | Synonyms: unilluminated, unlighted, unlit |
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| (adjective) giving no light | - |
| limbless | (adjective) having no limbs | - |
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| limitless | (adjective) having no limits in range or scope | Synonyms: unlimited |
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| (adjective) without limits in extent or size or quantity | Synonyms: illimitable, measureless, unmeasured |
| (adjective) seemingly boundless in amount, number, degree, or especially extent | Synonyms: boundless, unbounded |
| lipless | (adjective) without a lip or lips | Synonyms: unlipped |
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| listless | (adjective) lacking zest or vivacity | - |
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| (adjective) marked by low spirits; showing no enthusiasm | Synonyms: dispirited |
| loamless | (adjective) having no loam | - |
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| lordless | (adjective) having no lord or master | Synonyms: masterless |
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| lossless | (adjective) characterized by or causing no dissipation of energy | - |
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| loveless | (adjective) receiving no love | - |
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| (adjective) without love | - |
| luckless | (adjective) having or bringing misfortune | Synonyms: unlucky |
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| lusterless | (adjective) lacking luster or shine | Synonyms: lackluster, lacklustre, lustreless |
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| (adjective) lacking brilliance or vitality | Synonyms: lackluster, lacklustre, lustreless |
| lustreless | (adjective) lacking luster or shine | Synonyms: lackluster, lacklustre, lusterless |
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| (adjective) lacking brilliance or vitality | Synonyms: lackluster, lacklustre, lusterless |
| masterless | (adjective) having no lord or master | Synonyms: lordless |
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| matchless | (adjective) eminent beyond or above comparison | Synonyms: nonpareil, one, one and only, peerless, unmatchable, unmatched, unrivaled, unrivalled |
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| mateless | (adjective) of someone who has no marriage partner | - |
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| (adjective) without a sexual mate | - |
| meaningless | (adjective) having no meaning or direction or purpose | Synonyms: nonmeaningful |
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| (adjective) producing no result or effect | Synonyms: futile, ineffectual, otiose, unavailing |
| measureless | (adjective) without limits in extent or size or quantity | Synonyms: illimitable, limitless, unmeasured |
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| meatless | (adjective) lacking meat | - |
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| memberless | (adjective) of a group or set having no members | - |
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| merciless | (adjective) having or showing no mercy | Synonyms: unmerciful |
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| meritless | (adjective) without merit; of little or no value or use | Synonyms: good-for-naught, good-for-nothing, no-account, no-count, no-good, sorry |
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| messianic | (adjective) of or relating to a messiah promising deliverance | - |
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| messy | (adjective) dirty and disorderly | Synonyms: mussy |
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| milkless | (adjective) having no milk | - |
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| mindless | (adjective) not mindful or attentive | Synonyms: forgetful, unmindful |
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| (adjective) devoid of intelligence or thought | Synonyms: vacant, vacuous |
| (adjective) lacking the thinking capacity characteristic of a conscious being | - |
| (adjective) requiring little mental effort | - |
| (adjective) not marked by the use of reason | Synonyms: reasonless, senseless |
| mirthless | (adjective) lacking mirth | - |
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| moneyless | (adjective) not based on the possession of money | - |
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| (adjective) having no money | - |
| moonless | (adjective) without a moon or a visible moon | - |
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| motherless | (adjective) having no living or known mother | - |
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| motionless | (adjective) not in physical motion | Synonyms: inactive, static, still |
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| motiveless | (adjective) occurring without motivation or provocation | Synonyms: unprovoked, wanton |
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| motorless | (adjective) having no motor | Synonyms: unmotorised, unmotorized |
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| mouthless | (adjective) having no mouth or mouthlike opening | Synonyms: astomatous |
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| nameless | (adjective) being or having an unknown or unnamed source | Synonyms: unidentified, unknown, unnamed |
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| necessary | (adjective) absolutely essential | - |
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| (adjective) unavoidably determined by prior circumstances | - |
| necessitous | (adjective) poor enough to need help from others | Synonyms: destitute, impoverished, indigent, needy, poverty-stricken |
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| neckless | (adjective) lacking or apparently lacking a neck | - |
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| needless | (adjective) unnecessary and unwarranted | Synonyms: gratuitous, uncalled-for |
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| nerveless | (adjective) marked by calm self-control (especially in trying circumstances); unemotional | Synonyms: cool, coolheaded |
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| (adjective) lacking strength | Synonyms: feeble |
| newsless | (adjective) not providing news or information | - |
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| (adjective) not having or receiving news or information | - |
| noiseless | (adjective) making no sound | - |
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| nonaggressive | (adjective) not aggressive; not given to fighting or assertiveness | Synonyms: unaggressive |
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| nonessential | (adjective) not of prime or central importance | Synonyms: accidental, incidental |
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| nonprofessional | (adjective) not professional; not engaged in a profession or engaging in as a profession or for gain | - |
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| nonprogressive | (adjective) old-fashioned and out of date | Synonyms: fusty, standpat, unprogressive |
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| noseless | (adjective) having no nose | - |
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| numberless | (adjective) too numerous to be counted | Synonyms: countless, infinite, innumerable, innumerous, multitudinous, myriad, uncounted, unnumberable, unnumbered, unnumerable |
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| obsessed | (adjective) having or showing excessive or compulsive concern with something | Synonyms: haunted, preoccupied, taken up |
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| (adjective) influenced or controlled by a powerful force such as a strong emotion | Synonyms: possessed |
| obsessional | (adjective) characterized by or constituting an obsession | Synonyms: obsessive |
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| obsessive | (adjective) characterized by or constituting an obsession | Synonyms: obsessional |
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| odorless | (adjective) having no odor | Synonyms: inodorous, odourless |
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| odourless | (adjective) having no odor | Synonyms: inodorous, odorless |
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| offenceless | (adjective) incapable of offending or attacking | Synonyms: offenseless |
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| offenseless | (adjective) incapable of offending or attacking | Synonyms: offenceless |
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| oppressed | (adjective) burdened psychologically or mentally | Synonyms: laden |
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| oppressive | (adjective) marked by unjust severity or arbitrary behavior | Synonyms: tyrannical, tyrannous |
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| (adjective) weighing heavily on the senses or spirit | - |
| overdressed | (adjective) dressed too elaborately | - |
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| ownerless | (adjective) having no owner | Synonyms: unowned |
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| painless | (adjective) not causing physical or psychological pain | - |
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| (adjective) requiring little hard work or exertion | - |
| parentless | (adjective) having no parent or parents or not cared for by parent surrogates | Synonyms: unparented |
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| passionless | (adjective) not passionate | - |
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| (adjective) unmoved by feeling | Synonyms: emotionless |
| pathless | (adjective) lacking pathways | Synonyms: roadless, trackless, untracked, untrod, untrodden |
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| patronless | (adjective) having little patronage or few clients | Synonyms: unpatronised, unpatronized |
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| peerless | (adjective) eminent beyond or above comparison | Synonyms: matchless, nonpareil, one, one and only, unmatchable, unmatched, unrivaled, unrivalled |
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| penniless | (adjective) not having enough money to pay for necessities | Synonyms: hard up, impecunious, in straitened circumstances, penurious, pinched |
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| pessimal | (adjective) of an organism's environment; least favorable for survival | Synonyms: pessimum |
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| pessimistic | (adjective) expecting the worst possible outcome | - |
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| pessimum | (adjective) of an organism's environment; least favorable for survival | Synonyms: pessimal |
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| petalless | (adjective) (of flowers) having no petals | Synonyms: apetalous |
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| pilotless | (adjective) lacking a pilot | - |
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| pitiless | (adjective) deficient in humane and kindly feelings | Synonyms: unkind |
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| (adjective) without mercy or pity | Synonyms: remorseless, ruthless, unpitying |
| planless | (adjective) aimlessly drifting | Synonyms: adrift, afloat, aimless, directionless, rudderless, undirected |
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| pointless | (adjective) not having a point especially a sharp point | Synonyms: unpointed |
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| (adjective) having no points scores | Synonyms: goalless, hitless, scoreless |
| (adjective) serving no useful purpose; having no excuse for being | Synonyms: otiose, purposeless, senseless, superfluous, wasted |
| possessed | (adjective) of, pertaining to, or like a demon or possession by a demon | Synonyms: demoniac, demoniacal |
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| (adjective) influenced or controlled by a powerful force such as a strong emotion | Synonyms: obsessed |
| possessive | (adjective) serving to express or indicate possession | Synonyms: genitive |
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| (adjective) desirous of owning | - |
| (adjective) having or showing a desire to control or dominate | - |
| powerless | (adjective) lacking power | - |
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| prepossessing | (adjective) creating a favorable impression | - |
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| pressed | (adjective) compacted by ironing | - |
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| pressing | (adjective) compelling immediate action | Synonyms: urgent |
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| pressor | (adjective) increasing (or tending to increase) blood pressure | - |
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| priceless | (adjective) having incalculable monetary, intellectual, or spiritual worth | Synonyms: invaluable |
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| processed | (adjective) prepared or converted from a natural state by subjecting to a special process | - |
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| (adjective) freed from impurities by processing | Synonyms: refined |
| (adjective) subjected to a special process or treatment | - |
| processional | (adjective) of or relating to or characteristic of a procession | - |
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| (adjective) intended for use in a procession | - |
| professed | (adjective) openly declared as such | Synonyms: avowed |
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| (adjective) professing to be qualified | - |
| (adjective) claimed with intent to deceive | - |
| professional | (adjective) engaged in a profession or engaging in as a profession or means of livelihood | - |
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| (adjective) characteristic of or befitting a profession or one engaged in a profession | - |
| (adjective) of or relating to a profession | - |
| (adjective) of or relating to or suitable as a profession | - |
| (adjective) engaged in by members of a profession | - |
| professorial | (adjective) relating to or characteristic of professors | - |
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| profitless | (adjective) without profit or reward | - |
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| progressive | (adjective) favoring or promoting progress | - |
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| (adjective) (of taxes) adjusted so that the rate increases as the amount of income increases | - |
| (adjective) advancing in severity | - |
| (adjective) gradually advancing in extent | - |
| (adjective) favoring or promoting reform (often by government action) | Synonyms: reform-minded, reformist |
| (adjective) (of a card game or a dance) involving a series of sections for which the participants successively change place or relative position | - |
| propertyless | (adjective) of those who work for wages especially manual or industrial laborers | Synonyms: blue-collar, wage-earning, working-class |
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