15-Letter Words Ending in S

REPOSEFULNESS reposeful

Formal protests

Talks given by engineers with illustrations

Petitions that might interest a person involved (wordplay)

Repristination

Reproachful

Repudiationist

Reregistration

Reservationist

Skill in rising to an occasion.

Useful talent

Dependable quality

Restrictionism

Restrictionist

Retinoblastoma

Retransmission

Retroactivity

Retrogradation

Calculators of distance from earth

Revalorization

Revitalization

Revivification

Radicals sign, after rising

People fighting for change turn on sign

People seeking a change

Revolutionizer

Rheumatologist

Ribonucleoside

Ribonucleotide

RIGHTEOUSNESS The quality or state of being righteous; holiness; purity; uprightness; rectitude.

Rigidification

Roentgenology

Roundheaded

Rumbustious

RUMORMONGERING rumormonger

Sacrosanctity

SAGACIOUSNESS sagacious

SALACIOUSNESS salacious

Sanctification

Saponaceous

Saponification

Saprogenicity

Schematization

SCHISTOSOME

SCHISTOSOME

Scintillometer

Sclerotization

Seaworthiness

Secondariness

Secularization

Securitization

Sedimentology

SEDITIOUSNESS seditious

Segregationist

SENSATIONALISE sensational

Sensationalism

... people who like cheap thrills

Source of bad taste

Typical tabloid writers

Juices up

Hypes

Sensualization

Pompous formality

Excessive moralizing

Seroconversion

Servomechanism

Sigmoidoscopy

Silicification

Simplification

Abattoirs

Certain students of human behavior

Trait of kind people

Compassionate trait

Sheds tears often, contrived to show compassion

Solderability

Solidification

Solitudinarian

Solubilization

Somnambulation

Sophistication

SORROWFULNESS sorrowful

Specialisation

Specialization

Spectrography

Spectroscopist

Plural or third person singular

The development of the spermatozoids.

Spinthariscope

Naturalness; lack of guile.

State of being natural and unconstrained.

Sporangiophore

Stadtholderate

Lack of sociability

Aloof behavior

Hand stiffens so terribly on son showing cold quality

Plural or third person singular

Production of steroids by living organisms.

Stigmatization

Wall Street firms

Biographical information about Wall Street workers (wordplay)

Stoichiometry

Stratification

Stratovolcano

STRENUOUSNESS strenuous

Germ in toilet, pal scrubs away

Streptothricin

""STRONGYLOID Like, or pertaining to, Strongylus, a genus of parasitic nematode worms of which many species infest domestic animals. Some of the species, especially those living in the kidneys, lungs, and bronchial tubes, are often very injurious. Strongylus, a genus of parasitic nematode worms of which many species infest domestic animals. Some of the species, especially those living in the kidneys, lungs, and bronchial tubes, are often very injurious.""

""STRONGYLOID Like, or pertaining to, Strongylus, a genus of parasitic nematode worms of which many species infest domestic animals. Some of the species, especially those living in the kidneys, lungs, and bronchial tubes, are often very injurious. Strongylus, a genus of parasitic nematode worms of which many species infest domestic animals. Some of the species, especially those living in the kidneys, lungs, and bronchial tubes, are often very injurious.""

Stultification

Subdevelopment

Subinfeudation

Subordinate

Subproletariat

Proof-supplying demonstrations

Sulfinpyrazone

SULFUROUSNESS sulfurous

SUMPTUOUSNESS sumptuous

Superabsorbent

Superannuation

Atom smasher parts

They're used in cutting-edge electronics

Experimental electrical materials

Supercontinent

Superelevation

Supererogation

Superfluous

""SUPERINDUCTION The act of superinducing, or the state of being superinduced.""

SUPERINFECTION superinfect

Supermajority

Supernutrition

Superovulation

Superphosphate

SUPERSCRIPTION The act of superscribing.

Symmetrization

Sympathectomy

Synchronicity

Simultaneous timing

Bird's shank bone

Lacemaker made out with VIPs and slobs

Ragamuffins

Ragamuffins

Meetings, held in modern fashion

Meetings for the distanced

Teleprocessing

Foolish contempt of danger

Stormy state

Turbulence

Tumult.

Temporariness

TENACIOUSNESS tenacious

Bias towards controversy

Tenosynovitis

Tergiversation

Territorialism

Territorialist

Territorialize

Tetragrammaton

Thalassocracy

Thermalization

Thermojunction

Thermoreceptor

Thermoregulate

Inconsiderate behaviour

Unadmirable trait

Inconsideration

Thromboplastin

Thyroidectomy

Some banquet speakers

Dinner speakers

Some emcees

TOMBOYISHNESS tomboyish

Tonsillectomy

TOOTHSOMENESS toothsome

Traditionalism

Upholders of long-established customs

They go by the book

Those opposed to modernism.

Traditionalize

Transamination

False hair, wigs, etc.

Hyde's appearance

Mr. Hyde went through them

Souls' post-death passages

Moves from one place to another.

Removals.

Transvaluation

Traumatization

Unreliability destroyed southerner's case

Perfidious state when skin problem absorbs 3 (American) all covered in braid

TREMULOUSNESS tremulous

Trichomonacide

Trihalomethane

Trisoctahedron

Trivialization

They suss out and fix various problems

Expert problem solvers

Fixers sort Blues out, poking nose in

Troublesome

TROUBLOUSNESS troublous

Bank on value one head put on honesty

Honesty, reliability

Reliability

TRYPANOSOME

TRYPANOSOME

Turbogenerator

Tyrannosaurus

Ultimogeniture

Like neat freaks

Ultramicrotome

Ultramodernist

Ultramontanism

Plural noun (-sions)

Unappreciation

BOUNDEDNESSES boundedness

Uncircumcision

CONCERNEDNESS concerned

State after being coldcocked (and a clue to this puzzle's theme)

Underinflation

Undernutrition

Assigned prices that are too low

Unfavorable

Unforgiving

FOSSILIFEROUS Containing or composed of fossils.

Uniformitarian

Unknowability

Unmelodious

With doubly posh fellow other virtues point to modesty

Modesty.

Unprofessional

Failure to adhere to moral principles

SERIOUSNESSES seriousness

Unsociability

Unworkability

Unworldliness

Vasodilatation

Venturesome