Meaning: in progress; happening

Part of speech: adjective

Example: Plans for the event are afoot.

Category: Planning › Events

Synonyms:

• ongoing
• in progress

Antonyms:

• finished
• completed

Meaning: something that is thought of or added later

Part of speech: noun

Example: The change was an afterthought.

Category: Planning › Ideas

Synonyms:

• aftereffect
• addition