no it is not an adjective
Yes it can be an adjective: We walked past the parked cars.
yes parallel is an adjective because an ajective is a disribing word. ex: his car was parked parallel to mine
Yes, it is an adjective.
The word that can be a pronoun or a demonstrative adjective, e.g. that man. It can be also be used in relative clauses that limit the subject.(pronoun) That is the right answer.(adjective) That car was parked here before.(clause) The dress that she wanted had already been sold.
Yes the word Good is an adjective.
yes the word great is an adjective
Yes' the word excellent is an adjective.
Yes, the word, "Sporty" is an adjective.
yes. It is a descriptive word, so is an adjective.
If it describes a noun, then yes, it is an adjective.
Yes, the word 'landless' is an adjective.
Yes, the word traditional is an adjective.