*Malignant* - severe , critical and chronic.
Grave, sober, sincere, important, weighty
A synonym for changable is adaptable.
A synonym for common noun is word.
A synonym for debris is garbage. An antonym for debris is cleanliness.
A synonym for the word "sensor" is "detector".
The synonym for stern is strict or severe.
a minor
Serious, critical.
sinceresternsolemnsevere
riotous
Grave, sober, sincere, important, weighty
ceremony, gravity, sobriety
no , a synonym is the same meaning for a word and the antonym is the opposite meaning for a word e.g synonym for sad:devastated antonym for sad: happy
grave, pressing, serious, severe, extreme, urgent, drastic, daring, furious
Depending on what context: heartbreaking; heartrending; atrocious; flagitious; monstrous; shocking; dangerous; heavy; weighty; serious; severe;
There are many synonyms for the adjective "staid". One can interchange the word "staid" with words such as "sedate", "serious", "grave", "steady", and "composed".
steady- synonyms : firm, stable, solid, secure if your talking about in relashinships....serious maybee