Are heard and seen action words?

"Heard" and "seen" are not typically considered action words, or verbs. They are past participles of the verbs "hear" and "see."

Here's why:

* Action verbs describe actions a person or thing performs. Examples: run, jump, sing, write, eat.

* Past participles are used to form perfect tenses (e.g., "I have heard the news") and passive voice sentences (e.g., "The news was heard by everyone").

Examples:

* Action verb: "I heard a loud noise." (This describes the act of hearing)

* Past participle: "The noise heard outside was deafening." (This is a passive sentence)

However, "heard" and "seen" can sometimes be used as adjectives, describing a state of having been perceived.

Examples:

* "I saw a heard cat." (This describes the cat as having been previously heard)

* "She felt a seen presence in the room." (This describes the presence as having been previously seen)

Therefore, while not strictly action verbs, "heard" and "seen" can have a sense of action depending on their context and use.