feel safe与feel safety意思上有何区别

feel safe意思是感到安全，safe是名词，feel safety意思是感到安全的，safety是形容词，例如：

1.Many people still feel there is safety in numbers when belonging to a union.许多人仍然感到加入工会后会有强大的后盾。

2.Did you feel safety in this hotel?您在该宾馆内是否感到安全？

3.Have the view that mistake is inevitable in experiment, thus students will feel safety in mind.正确对待学生在实验中的错误观，使学生心理上有安全感。