fatigue:greattiredness,usuresultingfromhardworkorexercise疲乏;疲劳;疲倦:Wewereallsufferingfromfatigueattheendofourjourney.我们到旅程终点时全都累垮了.
tire:(causeapersonorananimalto)becomewearyorinneedofrest(使人或动物)疲劳,疲倦:She'sgotsomuchenergysheneverseemstotire.她精力充沛--似乎从不感到疲倦.*Oldpeopletireeasily.老年人容易疲倦.*Thelongwalktiredme(out).我长途步行之后很累.
fatigue是名词
tired是形容词