Synonyms and Antonyms for 1st

Synonyms:

• ordinal
• first

Antonyms:

• cardinal
• unoriginal
• back

Synonyms:

• 1st class
• first class
• correspondence
• mail
• first-class mail

Antonyms:

• inferiority
• low quality
• radial asymmetry
• asymmetry
• incompatibility