• untramatic,
• ontraumatic,
• untrumatic

• chromatic,
• rheumatic,
• Plumatic,
• traumatize,
• traumatic,
• aromatic,
• Draumatic,
• dramatic,
• prismatic,
• automatic.

The adjective form of "untraumatic" is "nontraumatic".

The plural form of "untraumatic" is "untraumatic." Plural is the same as the singular in this case.

The singular form of the word "untraumatic" is "untraumatic". The word remains the same in both the singular and plural forms.