Adam described the White Hart Lane wide-man as "probably one of the best players in the world on his day" as he ran through a list of Welshmen who he believes can give Craig Levein's men problems at the Cardiff City Stadium.
The Scotland midfielder said: "Aaron Ramsay is a top player, there is Ashley Williams, and Joe Allen at Liverpool. I wouldn't just single out Gareth Bale. But he is a top player and if we can stop him it will probably enhance our performance and probably our chances of winning the game."
Adam added: "Bale is good, quick but I don't think they are a one-man team. They have a number of players, like we have, who can win the game on their day."
Wales go into the game on the back of a demoralising 6-1 thrashing in Serbia which followed a 2-0 home defeat to Belgium in their Group A opener.
Under-fire manager Chris Coleman, who has lost all four games since taking over from the late Gary Speed, subsequently took the captaincy away from 21-year-old Arsenal midfielder Ramsey and gave it to Swansea defender Ashley Williams.
However, Adam said: "Are they in turmoil really? I don't think they are. They have good players. Results are difficult at this level. The games they have had have been tough games."
Draws against Serbia and Macedonia at Hampden last month have left Scotland's qualifying hopes in the balance after only two games. But Adam feels the return to the squad of striker Steven Fletcher and midfielders Darren Fletcher and Scott Brown can make the difference, first against the Welsh and then away to Belgium next Tuesday night.
"I think there is a lot of improvement in us," he said. "Even though we didn't play too badly in the last two games, obviously the results didn't go for us. Sometimes you don't get the rub of the green but if we could get that in the next two games, you never know where that could take us.
"Darren has obviously played at Manchester United since he was a young player and played a number of games at the highest level for club and country. His experience will tell and Steven Fletcher has scored a lot of goals no matter what club he has gone to, and to add that to what we already have is very good for us."
Source: PA
Source: PA