Difference between Rude and Ungentlemanly

RUDE vs UNGENTLEMANLY: ADJECTIVE

Lacking education or refinement.
Vigorous or robust.
Unpleasantly forceful or harsh.
In a natural, raw state.
Crude, unfinished, or made with limited skill.
Undeveloped or uncivilized; primitive.
Ill-mannered, discourteous, or insulting.
(of persons) lacking in refinement or grace
Belonging to an early stage of technical development; characterized by simplicity and (often) crudeness
Socially incorrect in behavior
Characterized by roughness; umpolished; raw; lacking delicacy or refinement; coarse.
Unformed by taste or skill; not nicely finished; not smoothed or polished; -- said especially of material things.
Of untaught manners; unpolished; of low rank; uncivil; clownish; ignorant; raw; unskillful; -- said of persons, or of conduct, skill, and the like.
Violent; tumultuous; boisterous; inclement; harsh; severe; -- said of the weather, of storms, and the like.
Barbarous; fierce; bloody; impetuous; -- said of war, conflict, and the like; as, the rude shock of armies.
Not finished or complete; inelegant; lacking chasteness or elegance; not in good taste; unsatisfactory in mode of treatment; -- said of literature, language, style, and the like.
Bad mannered.
Obscene, pornographic, offensive.
Tough, robust.
Undeveloped, unskilled, basic.
Hearty, vigorous; found particularly in the phrase rude health.
(used especially of commodities) being unprocessed or manufactured using only simple or minimal processes
Lacking civility or good manners

Not befitting a gentleman
Not gentlemanly; not adhering to the high moral standards expected of a gentleman; impolite, unchivalrous, or indecent.

Having a fierce or cruel disposition; ferocious; sanguinary; savage; brutal.
Marked by or expressing fierceness or savageness; ferocious, fierce, or cruel in quality.
Ill-bred; boorish; uncivil; discourteous; impolite.
Marked, by incivility; contrary to the requirements of. courtesy: as, rude conduct; a rude remark.
Rough; tempestuous; stormy: as, a rude gale; rude weather.
Robust; sturdy; rugged; vigorous.
Synonyms Ill-shaped, raw, uncouth, unformed.
7 and Vulgar, loutish, boorish, ill-bred, insolent, surly, churlish, gruff, brusk.
Harsh, inclement, violent, turbulent.
Mean; humble; little known or regarded; hence, as said of persons, low by birth or position.
Lacking cultivation, refinement, or elegance; clumsy; uncouth: as, rude verses; rude art.
Rough; crude; unwrought; unfashioned; ill-fashioned; without finish or shapeliness: as, a rude mass of material.
Barbarous; uncivilized; unpolished; ignorant.
Rudely.

Ill mannered, Lowbred, Bounderish, Underbred, Early, Natural, Unprocessed, Raw, Crude, Primitive, Unrefined, Unmannered, Uncivil, Unmannerly, Impolite

Lowbred, Ill mannered, Ill bred, Bounderish, Early, Natural, Unprocessed, Raw, Crude, Primitive, Unrefined, Unmannered, Uncivil, Unmannerly, Impolite

Some of the comments on here are rude.
During this time her tone became increasingly rude.
They may be rude, anxious, or downright aggressive.
Horrible Experience, other kids were rude and privileged.
For those of you saying its rude its not rude it happens especially if you are a single parent.
The workers were rude on deliver and rude on the times we did carry out!
It may seem rude, but, you need a final head count and if they have not replied, then they are actually the rude ones!
If some customer was rude, you gained nothing by being rude in return and were likely to put off anyone else within earshot.
Telling people they are rude is generally not very useful, as well as being rude itself.
Catcalling and rude remarks and rude noises are a constant at women.

Her pain degraded him, making him feel uncouth and ungentlemanly, and that only made him angrier.
To use phrases which admit of a double meaning, is ungentlemanly, and, if addressed to a lady, they become positively insulting.
He was originally an intelligence officer in Sudan, under Orde Wingate, organising "ungentlemanly warfare" against Italy in Ethiopia.
The figure is not good; it struts, and has an air of nonchalance and ungentlemanly assumption.
Your ungentlemanly insults against Netanyahu, Will, Hagee, and Herzl are not worth discussing.
But the occasion was marred by an ungentlemanly exchange.