Synonyms for serious reason

Synonyms for serious

severe (grievous, weighty, solemn >>)
grave (heavy, good, earnest >>)
dangerous
sober
hazardous

See all synonyms for serious

Synonyms for reason

why (occasion, ground, >>)
cause
explanation (argument, rationale, justification >>)
mind (sense, understanding, intellect >>)
motive
excuse
argue
account
rationality
causation
wherefore

See all synonyms for reason