1. (adjective) being of striking appropriateness and pertinence

• apposite
• apt

1. (adjective) having precise or logical relevance to the matter at hand

• relevant

2. (adjective) being of striking appropriateness and pertinence

• apropos

1. (adjective) having precise or logical relevance to the matter at hand

• appertain
• pertain
• applicability
• applicability
• pertinence
• pertinence
• pertinency
• pertinency

2. (adjective) being of striking appropriateness and pertinence

• applicability
• applicability
• pertinence
• pertinence
• pertinency
• pertinency
• appositeness
• appositeness
• aptness
• aptness
• bear on
• come to
• concern
• have-to doe with
• pertain
• refer
• relate
• touch
• touch on